/*!

 * Modernizr v2.5.2

 * www.modernizr.com

 *

 * Copyright (c) Faruk Ates, Paul Irish, Alex Sexton

 * Available under the BSD and MIT licenses: www.modernizr.com/license/

 */



/*

 * Modernizr tests which native CSS3 and HTML5 features are available in

 * the current UA and makes the results available to you in two ways:

 * as properties on a global Modernizr object, and as classes on the

 * <html> element. This information allows you to progressively enhance

 * your pages with a granular level of control over the experience.

 *

 * Modernizr has an optional (not included) conditional resource loader

 * called Modernizr.load(), based on Yepnope.js (yepnopejs.com).

 * To get a build that includes Modernizr.load(), as well as choosing

 * which tests to include, go to www.modernizr.com/download/

 *

 * Authors        Faruk Ates, Paul Irish, Alex Sexton

 * Contributors   Ryan Seddon, Ben Alman

 */



window.Modernizr = (function( window, document, undefined ) {



    var version = '2.5.2',



    Modernizr = {},

    

    // option for enabling the HTML classes to be added

    enableClasses = true,



    docElement = document.documentElement,



    /**

     * Create our "modernizr" element that we do most feature tests on.

     */

    mod = 'modernizr',

    modElem = document.createElement(mod),

    mStyle = modElem.style,



    /**

     * Create the input element for various Web Forms feature tests.

     */

    inputElem = document.createElement('input'),



    smile = ':)',



    toString = {}.toString,



    // List of property values to set for css tests. See ticket #21

    prefixes = ' -webkit- -moz- -o- -ms- '.split(' '),



    // Following spec is to expose vendor-specific style properties as:

    //   elem.style.WebkitBorderRadius

    // and the following would be incorrect:

    //   elem.style.webkitBorderRadius



    // Webkit ghosts their properties in lowercase but Opera & Moz do not.

    // Microsoft uses a lowercase `ms` instead of the correct `Ms` in IE8+

    //   erik.eae.net/archives/2008/03/10/21.48.10/



    // More here: github.com/Modernizr/Modernizr/issues/issue/21

    omPrefixes = 'Webkit Moz O ms',



    cssomPrefixes = omPrefixes.split(' '),



    domPrefixes = omPrefixes.toLowerCase().split(' '),



    ns = {'svg': 'http://www.w3.org/2000/svg'},



    tests = {},

    inputs = {},

    attrs = {},



    classes = [],



    slice = classes.slice,



    featureName, // used in testing loop





    // Inject element with style element and some CSS rules

    injectElementWithStyles = function( rule, callback, nodes, testnames ) {



      var style, ret, node,

          div = document.createElement('div'),

          // After page load injecting a fake body doesn't work so check if body exists

          body = document.body, 

          // IE6 and 7 won't return offsetWidth or offsetHeight unless it's in the body element, so we fake it.

          fakeBody = body ? body : document.createElement('body');



      if ( parseInt(nodes, 10) ) {

          // In order not to give false positives we create a node for each test

          // This also allows the method to scale for unspecified uses

          while ( nodes-- ) {

              node = document.createElement('div');

              node.id = testnames ? testnames[nodes] : mod + (nodes + 1);

              div.appendChild(node);

          }

      }



      // <style> elements in IE6-9 are considered 'NoScope' elements and therefore will be removed

      // when injected with innerHTML. To get around this you need to prepend the 'NoScope' element

      // with a 'scoped' element, in our case the soft-hyphen entity as it won't mess with our measurements.

      // msdn.microsoft.com/en-us/library/ms533897%28VS.85%29.aspx

      // Documents served as xml will throw if using &shy; so use xml friendly encoded version. See issue #277

      style = ['&#173;','<style>', rule, '</style>'].join('');

      div.id = mod;

      // IE6 will false positive on some tests due to the style element inside the test div somehow interfering offsetHeight, so insert it into body or fakebody.

      // Opera will act all quirky when injecting elements in documentElement when page is served as xml, needs fakebody too. #270

      fakeBody.innerHTML += style;

      fakeBody.appendChild(div);

      if(!body){

          docElement.appendChild(fakeBody);

      }



      ret = callback(div, rule);

      // If this is done after page load we don't want to remove the body so check if body exists

      !body ? fakeBody.parentNode.removeChild(fakeBody) : div.parentNode.removeChild(div);



      return !!ret;



    },





    // adapted from matchMedia polyfill

    // by Scott Jehl and Paul Irish

    // gist.github.com/786768

    testMediaQuery = function( mq ) {



      var matchMedia = window.matchMedia || window.msMatchMedia;

      if ( matchMedia ) {

        return matchMedia(mq).matches;

      }



      var bool;



      injectElementWithStyles('@media ' + mq + ' { #' + mod + ' { position: absolute; } }', function( node ) {

        bool = (window.getComputedStyle ?

                  getComputedStyle(node, null) :

                  node.currentStyle)['position'] == 'absolute';

      });



      return bool;



     },





    /**

      * isEventSupported determines if a given element supports the given event

      * function from yura.thinkweb2.com/isEventSupported/

      */

    isEventSupported = (function() {



      var TAGNAMES = {

        'select': 'input', 'change': 'input',

        'submit': 'form', 'reset': 'form',

        'error': 'img', 'load': 'img', 'abort': 'img'

      };



      function isEventSupported( eventName, element ) {



        element = element || document.createElement(TAGNAMES[eventName] || 'div');

        eventName = 'on' + eventName;



        // When using `setAttribute`, IE skips "unload", WebKit skips "unload" and "resize", whereas `in` "catches" those

        var isSupported = eventName in element;



        if ( !isSupported ) {

          // If it has no `setAttribute` (i.e. doesn't implement Node interface), try generic element

          if ( !element.setAttribute ) {

            element = document.createElement('div');

          }

          if ( element.setAttribute && element.removeAttribute ) {

            element.setAttribute(eventName, '');

            isSupported = is(element[eventName], 'function');



            // If property was created, "remove it" (by setting value to `undefined`)

            if ( !is(element[eventName], 'undefined') ) {

              element[eventName] = undefined;

            }

            element.removeAttribute(eventName);

          }

        }



        element = null;

        return isSupported;

      }

      return isEventSupported;

    })();



    // hasOwnProperty shim by kangax needed for Safari 2.0 support

    var _hasOwnProperty = ({}).hasOwnProperty, hasOwnProperty;

    if ( !is(_hasOwnProperty, 'undefined') && !is(_hasOwnProperty.call, 'undefined') ) {

      hasOwnProperty = function (object, property) {

        return _hasOwnProperty.call(object, property);

      };

    }

    else {

      hasOwnProperty = function (object, property) { /* yes, this can give false positives/negatives, but most of the time we don't care about those */

        return ((property in object) && is(object.constructor.prototype[property], 'undefined'));

      };

    }



    // Taken from ES5-shim https://github.com/kriskowal/es5-shim/blob/master/es5-shim.js

    // ES-5 15.3.4.5

    // http://es5.github.com/#x15.3.4.5



    if (!Function.prototype.bind) {

      

      Function.prototype.bind = function bind(that) {

        

        var target = this;

        

        if (typeof target != "function") {

            throw new TypeError();

        }

        

        var args = slice.call(arguments, 1),

            bound = function () {



            if (this instanceof bound) {

              

              var F = function(){};

              F.prototype = target.prototype;

              var self = new F;



              var result = target.apply(

                  self,

                  args.concat(slice.call(arguments))

              );

              if (Object(result) === result) {

                  return result;

              }

              return self;



            } else {

              

              return target.apply(

                  that,

                  args.concat(slice.call(arguments))

              );



            }



        };

        

        return bound;

      };

    }



    /**

     * setCss applies given styles to the Modernizr DOM node.

     */

    function setCss( str ) {

        mStyle.cssText = str;

    }



    /**

     * setCssAll extrapolates all vendor-specific css strings.

     */

    function setCssAll( str1, str2 ) {

        return setCss(prefixes.join(str1 + ';') + ( str2 || '' ));

    }



    /**

     * is returns a boolean for if typeof obj is exactly type.

     */

    function is( obj, type ) {

        return typeof obj === type;

    }



    /**

     * contains returns a boolean for if substr is found within str.

     */

    function contains( str, substr ) {

        return !!~('' + str).indexOf(substr);

    }



    /**

     * testProps is a generic CSS / DOM property test; if a browser supports

     *   a certain property, it won't return undefined for it.

     *   A supported CSS property returns empty string when its not yet set.

     */

    function testProps( props, prefixed ) {

        for ( var i in props ) {

            if ( mStyle[ props[i] ] !== undefined ) {

                return prefixed == 'pfx' ? props[i] : true;

            }

        }

        return false;

    }



    /**

     * testDOMProps is a generic DOM property test; if a browser supports

     *   a certain property, it won't return undefined for it.

     */

    function testDOMProps( props, obj, elem ) {

        for ( var i in props ) {

            var item = obj[props[i]];

            if ( item !== undefined) {



                // return the property name as a string

                if (elem === false) return props[i];



                // let's bind a function

                if (is(item, 'function')){

                  // default to autobind unless override

                  return item.bind(elem || obj);

                }

                

                // return the unbound function or obj or value

                return item;

            }

        }

        return false;

    }



    /**

     * testPropsAll tests a list of DOM properties we want to check against.

     *   We specify literally ALL possible (known and/or likely) properties on

     *   the element including the non-vendor prefixed one, for forward-

     *   compatibility.

     */

    function testPropsAll( prop, prefixed, elem ) {



        var ucProp  = prop.charAt(0).toUpperCase() + prop.substr(1),

            props   = (prop + ' ' + cssomPrefixes.join(ucProp + ' ') + ucProp).split(' ');



        // did they call .prefixed('boxSizing') or are we just testing a prop?

        if(is(prefixed, "string") || is(prefixed, "undefined")) {

          return testProps(props, prefixed);



        // otherwise, they called .prefixed('requestAnimationFrame', window[, elem])

        } else {

          props = (prop + ' ' + (domPrefixes).join(ucProp + ' ') + ucProp).split(' ');

          return testDOMProps(props, prefixed, elem);

        }

    }



    /**

     * testBundle tests a list of CSS features that require element and style injection.

     *   By bundling them together we can reduce the need to touch the DOM multiple times.

     */

    /*>>testBundle*/

    var testBundle = (function( styles, tests ) {

        var style = styles.join(''),

            len = tests.length;



        injectElementWithStyles(style, function( node, rule ) {

            var style = document.styleSheets[document.styleSheets.length - 1],

                // IE8 will bork if you create a custom build that excludes both fontface and generatedcontent tests.

                // So we check for cssRules and that there is a rule available

                // More here: github.com/Modernizr/Modernizr/issues/288 & github.com/Modernizr/Modernizr/issues/293

                cssText = style ? (style.cssRules && style.cssRules[0] ? style.cssRules[0].cssText : style.cssText || '') : '',

                children = node.childNodes, hash = {};



            while ( len-- ) {

                hash[children[len].id] = children[len];

            }



             /*>>touch*/          Modernizr['touch'] = ('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch || (hash['touch'] && hash['touch'].offsetTop) === 9; /*>>touch*/

            /*>>csstransforms3d*/ Modernizr['csstransforms3d'] = (hash['csstransforms3d'] && hash['csstransforms3d'].offsetLeft) === 9 && hash['csstransforms3d'].offsetHeight === 3;          /*>>csstransforms3d*/

            /*>>generatedcontent*/Modernizr['generatedcontent'] = (hash['generatedcontent'] && hash['generatedcontent'].offsetHeight) >= 1;       /*>>generatedcontent*/

            /*>>fontface*/        Modernizr['fontface'] = /src/i.test(cssText) &&

                                                                  cssText.indexOf(rule.split(' ')[0]) === 0;        /*>>fontface*/

        }, len, tests);



    })([

        // Pass in styles to be injected into document

        /*>>fontface*/        '@font-face {font-family:"font";src:url("https://")}'         /*>>fontface*/

        

        /*>>touch*/           ,['@media (',prefixes.join('touch-enabled),('),mod,')',

                                '{#touch{top:9px;position:absolute}}'].join('')           /*>>touch*/

                                

        /*>>csstransforms3d*/ ,['@media (',prefixes.join('transform-3d),('),mod,')',

                                '{#csstransforms3d{left:9px;position:absolute;height:3px;}}'].join('')/*>>csstransforms3d*/

                                

        /*>>generatedcontent*/,['#generatedcontent:after{content:"',smile,'";visibility:hidden}'].join('')  /*>>generatedcontent*/

    ],

      [

        /*>>fontface*/        'fontface'          /*>>fontface*/

        /*>>touch*/           ,'touch'            /*>>touch*/

        /*>>csstransforms3d*/ ,'csstransforms3d'  /*>>csstransforms3d*/

        /*>>generatedcontent*/,'generatedcontent' /*>>generatedcontent*/

        

    ]);/*>>testBundle*/





    /**

     * Tests

     * -----

     */



    // The *new* flexbox

    // dev.w3.org/csswg/css3-flexbox



    tests['flexbox'] = function() {

      return testPropsAll('flexOrder');

    };



    // The *old* flexbox

    // www.w3.org/TR/2009/WD-css3-flexbox-20090723/



    tests['flexbox-legacy'] = function() {

        return testPropsAll('boxDirection');

    };



    // On the S60 and BB Storm, getContext exists, but always returns undefined

    // so we actually have to call getContext() to verify

    // github.com/Modernizr/Modernizr/issues/issue/97/



    tests['canvas'] = function() {

        var elem = document.createElement('canvas');

        return !!(elem.getContext && elem.getContext('2d'));

    };



    tests['canvastext'] = function() {

        return !!(Modernizr['canvas'] && is(document.createElement('canvas').getContext('2d').fillText, 'function'));

    };



    // this test initiates a new webgl context. 

    // webk.it/70117 is tracking a legit feature detect proposal

    

    tests['webgl'] = function() {

        try {

            var canvas = document.createElement('canvas'),

                ret;

            ret = !!(window.WebGLRenderingContext && (canvas.getContext('experimental-webgl') || canvas.getContext('webgl')));

            canvas = undefined;

        } catch (e){

            ret = false;

        }

        return ret;

    };



    /*

     * The Modernizr.touch test only indicates if the browser supports

     *    touch events, which does not necessarily reflect a touchscreen

     *    device, as evidenced by tablets running Windows 7 or, alas,

     *    the Palm Pre / WebOS (touch) phones.

     *

     * Additionally, Chrome (desktop) used to lie about its support on this,

     *    but that has since been rectified: crbug.com/36415

     *

     * We also test for Firefox 4 Multitouch Support.

     *

     * For more info, see: modernizr.github.com/Modernizr/touch.html

     */



    tests['touch'] = function() {

        return Modernizr['touch'];

    };



    /**

     * geolocation tests for the new Geolocation API specification.

     *   This test is a standards compliant-only test; for more complete

     *   testing, including a Google Gears fallback, please see:

     *   code.google.com/p/geo-location-javascript/

     * or view a fallback solution using google's geo API:

     *   gist.github.com/366184

     */

    tests['geolocation'] = function() {

        return !!navigator.geolocation;

    };



    // Per 1.6:

    // This used to be Modernizr.crosswindowmessaging but the longer

    // name has been deprecated in favor of a shorter and property-matching one.

    // The old API is still available in 1.6, but as of 2.0 will throw a warning,

    // and in the first release thereafter disappear entirely.

    tests['postmessage'] = function() {

      return !!window.postMessage;

    };





    // Chrome incognito mode used to throw an exception when using openDatabase 

    // It doesn't anymore.

    tests['websqldatabase'] = function() {

      return !!window.openDatabase;

    };



    // Vendors had inconsistent prefixing with the experimental Indexed DB:

    // - Webkit's implementation is accessible through webkitIndexedDB

    // - Firefox shipped moz_indexedDB before FF4b9, but since then has been mozIndexedDB

    // For speed, we don't test the legacy (and beta-only) indexedDB

    tests['indexedDB'] = function() {

      return !!testPropsAll("indexedDB",window);

    };



    // documentMode logic from YUI to filter out IE8 Compat Mode

    //   which false positives.

    tests['hashchange'] = function() {

      return isEventSupported('hashchange', window) && (document.documentMode === undefined || document.documentMode > 7);

    };



    // Per 1.6:

    // This used to be Modernizr.historymanagement but the longer

    // name has been deprecated in favor of a shorter and property-matching one.

    // The old API is still available in 1.6, but as of 2.0 will throw a warning,

    // and in the first release thereafter disappear entirely.

    tests['history'] = function() {

      return !!(window.history && history.pushState);

    };



    tests['draganddrop'] = function() {

        var div = document.createElement('div');

        return ('draggable' in div) || ('ondragstart' in div && 'ondrop' in div);

    };



    // FIXME: Once FF10 is sunsetted, we can drop prefixed MozWebSocket

    // bugzil.la/695635

    tests['websockets'] = function() {

        for ( var i = -1, len = cssomPrefixes.length; ++i < len; ){

          if ( window[cssomPrefixes[i] + 'WebSocket'] ){

            return true;

          }

        }

        return 'WebSocket' in window;

    };





    // css-tricks.com/rgba-browser-support/

    tests['rgba'] = function() {

        // Set an rgba() color and check the returned value



        setCss('background-color:rgba(150,255,150,.5)');



        return contains(mStyle.backgroundColor, 'rgba');

    };



    tests['hsla'] = function() {

        // Same as rgba(), in fact, browsers re-map hsla() to rgba() internally,

        //   except IE9 who retains it as hsla



        setCss('background-color:hsla(120,40%,100%,.5)');



        return contains(mStyle.backgroundColor, 'rgba') || contains(mStyle.backgroundColor, 'hsla');

    };



    tests['multiplebgs'] = function() {

        // Setting multiple images AND a color on the background shorthand property

        //  and then querying the style.background property value for the number of

        //  occurrences of "url(" is a reliable method for detecting ACTUAL support for this!



        setCss('background:url(https://),url(https://),red url(https://)');



        // If the UA supports multiple backgrounds, there should be three occurrences

        //   of the string "url(" in the return value for elemStyle.background



        return /(url\s*\(.*?){3}/.test(mStyle.background);

    };





    // In testing support for a given CSS property, it's legit to test:

    //    `elem.style[styleName] !== undefined`

    // If the property is supported it will return an empty string,

    // if unsupported it will return undefined.



    // We'll take advantage of this quick test and skip setting a style

    // on our modernizr element, but instead just testing undefined vs

    // empty string.





    tests['backgroundsize'] = function() {

        return testPropsAll('backgroundSize');

    };



    tests['borderimage'] = function() {

        return testPropsAll('borderImage');

    };





    // Super comprehensive table about all the unique implementations of

    // border-radius: muddledramblings.com/table-of-css3-border-radius-compliance



    tests['borderradius'] = function() {

        return testPropsAll('borderRadius');

    };



    // WebOS unfortunately false positives on this test.

    tests['boxshadow'] = function() {

        return testPropsAll('boxShadow');

    };



    // FF3.0 will false positive on this test

    tests['textshadow'] = function() {

        return document.createElement('div').style.textShadow === '';

    };





    tests['opacity'] = function() {

        // Browsers that actually have CSS Opacity implemented have done so

        //  according to spec, which means their return values are within the

        //  range of [0.0,1.0] - including the leading zero.



        setCssAll('opacity:.55');



        // The non-literal . in this regex is intentional:

        //   German Chrome returns this value as 0,55

        // github.com/Modernizr/Modernizr/issues/#issue/59/comment/516632

        return /^0.55$/.test(mStyle.opacity);

    };





    // Note, Android < 4 will pass this test, but can only animate 

    //   a single property at a time

    //   daneden.me/2011/12/putting-up-with-androids-bullshit/

    tests['cssanimations'] = function() {

        return testPropsAll('animationName');

    };





    tests['csscolumns'] = function() {

        return testPropsAll('columnCount');

    };





    tests['cssgradients'] = function() {

        /**

         * For CSS Gradients syntax, please see:

         * webkit.org/blog/175/introducing-css-gradients/

         * developer.mozilla.org/en/CSS/-moz-linear-gradient

         * developer.mozilla.org/en/CSS/-moz-radial-gradient

         * dev.w3.org/csswg/css3-images/#gradients-

         */



        var str1 = 'background-image:',

            str2 = 'gradient(linear,left top,right bottom,from(#9f9),to(white));',

            str3 = 'linear-gradient(left top,#9f9, white);';



        setCss(

             // legacy webkit syntax (FIXME: remove when syntax not in use anymore)

              (str1 + '-webkit- '.split(' ').join(str2 + str1) 

             // standard syntax             // trailing 'background-image:' 

              + prefixes.join(str3 + str1)).slice(0, -str1.length)

        );



        return contains(mStyle.backgroundImage, 'gradient');

    };





    tests['cssreflections'] = function() {

        return testPropsAll('boxReflect');

    };





    tests['csstransforms'] = function() {

        return !!testPropsAll('transform');

    };





    tests['csstransforms3d'] = function() {



        var ret = !!testPropsAll('perspective');



        // Webkit's 3D transforms are passed off to the browser's own graphics renderer.

        //   It works fine in Safari on Leopard and Snow Leopard, but not in Chrome in

        //   some conditions. As a result, Webkit typically recognizes the syntax but

        //   will sometimes throw a false positive, thus we must do a more thorough check:

        if ( ret && 'webkitPerspective' in docElement.style ) {



          // Webkit allows this media query to succeed only if the feature is enabled.

          // `@media (transform-3d),(-o-transform-3d),(-moz-transform-3d),(-ms-transform-3d),(-webkit-transform-3d),(modernizr){ ... }`

          ret = Modernizr['csstransforms3d'];

        }

        return ret;

    };





    tests['csstransitions'] = function() {

        return testPropsAll('transition');

    };





    /*>>fontface*/

    // @font-face detection routine by Diego Perini

    // javascript.nwbox.com/CSSSupport/



    // false positives in WebOS: github.com/Modernizr/Modernizr/issues/342

    tests['fontface'] = function() {

        return Modernizr['fontface'];

    };

    /*>>fontface*/



    // CSS generated content detection

    tests['generatedcontent'] = function() {

        return Modernizr['generatedcontent'];

    };







    // These tests evaluate support of the video/audio elements, as well as

    // testing what types of content they support.

    //

    // We're using the Boolean constructor here, so that we can extend the value

    // e.g.  Modernizr.video     // true

    //       Modernizr.video.ogg // 'probably'

    //

    // Codec values from : github.com/NielsLeenheer/html5test/blob/9106a8/index.html#L845

    //                     thx to NielsLeenheer and zcorpan



    // Note: in some older browsers, "no" was a return value instead of empty string.

    //   It was live in FF3.5.0 and 3.5.1, but fixed in 3.5.2

    //   It was also live in Safari 4.0.0 - 4.0.4, but fixed in 4.0.5



    tests['video'] = function() {

        var elem = document.createElement('video'),

            bool = false;

            

        // IE9 Running on Windows Server SKU can cause an exception to be thrown, bug #224

        try {

            if ( bool = !!elem.canPlayType ) {

                bool      = new Boolean(bool);

                bool.ogg  = elem.canPlayType('video/ogg; codecs="theora"')      .replace(/^no$/,'');



                bool.h264 = elem.canPlayType('video/mp4; codecs="avc1.42E01E"') .replace(/^no$/,'');



                bool.webm = elem.canPlayType('video/webm; codecs="vp8, vorbis"').replace(/^no$/,'');

            }

            

        } catch(e) { }

        

        return bool;

    };



    tests['audio'] = function() {

        var elem = document.createElement('audio'),

            bool = false;



        try { 

            if ( bool = !!elem.canPlayType ) {

                bool      = new Boolean(bool);

                bool.ogg  = elem.canPlayType('audio/ogg; codecs="vorbis"').replace(/^no$/,'');

                bool.mp3  = elem.canPlayType('audio/mpeg;')               .replace(/^no$/,'');



                // Mimetypes accepted:

                //   developer.mozilla.org/En/Media_formats_supported_by_the_audio_and_video_elements

                //   bit.ly/iphoneoscodecs

                bool.wav  = elem.canPlayType('audio/wav; codecs="1"')     .replace(/^no$/,'');

                bool.m4a  = ( elem.canPlayType('audio/x-m4a;')            || 

                              elem.canPlayType('audio/aac;'))             .replace(/^no$/,'');

            }

        } catch(e) { }

        

        return bool;

    };





    // In FF4, if disabled, window.localStorage should === null.



    // Normally, we could not test that directly and need to do a

    //   `('localStorage' in window) && ` test first because otherwise Firefox will

    //   throw bugzil.la/365772 if cookies are disabled



    // Also in iOS5 Private Browsing mode, attepting to use localStorage.setItem

    // will throw the exception:

    //   QUOTA_EXCEEDED_ERRROR DOM Exception 22.

    // Peculiarly, getItem and removeItem calls do not throw.



    // Because we are forced to try/catch this, we'll go aggressive.



    // Just FWIW: IE8 Compat mode supports these features completely:

    //   www.quirksmode.org/dom/html5.html

    // But IE8 doesn't support either with local files



    tests['localstorage'] = function() {

        try {

            localStorage.setItem(mod, mod);

            localStorage.removeItem(mod);

            return true;

        } catch(e) {

            return false;

        }

    };



    tests['sessionstorage'] = function() {

        try {

            sessionStorage.setItem(mod, mod);

            sessionStorage.removeItem(mod);

            return true;

        } catch(e) {

            return false;

        }

    };





    tests['webworkers'] = function() {

        return !!window.Worker;

    };





    tests['applicationcache'] = function() {

        return !!window.applicationCache;

    };





    // Thanks to Erik Dahlstrom

    tests['svg'] = function() {

        return !!document.createElementNS && !!document.createElementNS(ns.svg, 'svg').createSVGRect;

    };



    // specifically for SVG inline in HTML, not within XHTML

    // test page: paulirish.com/demo/inline-svg

    tests['inlinesvg'] = function() {

      var div = document.createElement('div');

      div.innerHTML = '<svg/>';

      return (div.firstChild && div.firstChild.namespaceURI) == ns.svg;

    };



    // SVG SMIL animation

    tests['smil'] = function() {

        return !!document.createElementNS && /SVGAnimate/.test(toString.call(document.createElementNS(ns.svg, 'animate')));

    };



    // This test is only for clip paths in SVG proper, not clip paths on HTML content

    // demo: srufaculty.sru.edu/david.dailey/svg/newstuff/clipPath4.svg



    // However read the comments to dig into applying SVG clippaths to HTML content here:

    //   github.com/Modernizr/Modernizr/issues/213#issuecomment-1149491

    tests['svgclippaths'] = function() {

        return !!document.createElementNS && /SVGClipPath/.test(toString.call(document.createElementNS(ns.svg, 'clipPath')));

    };



    // input features and input types go directly onto the ret object, bypassing the tests loop.

    // Hold this guy to execute in a moment.

    function webforms() {

        // Run through HTML5's new input attributes to see if the UA understands any.

        // We're using f which is the <input> element created early on

        // Mike Taylr has created a comprehensive resource for testing these attributes

        //   when applied to all input types:

        //   miketaylr.com/code/input-type-attr.html

        // spec: www.whatwg.org/specs/web-apps/current-work/multipage/the-input-element.html#input-type-attr-summary

        

        // Only input placeholder is tested while textarea's placeholder is not. 

        // Currently Safari 4 and Opera 11 have support only for the input placeholder

        // Both tests are available in feature-detects/forms-placeholder.js

        Modernizr['input'] = (function( props ) {

            for ( var i = 0, len = props.length; i < len; i++ ) {

                attrs[ props[i] ] = !!(props[i] in inputElem);

            }

            if (attrs.list){

              // safari false positive's on datalist: webk.it/74252

              // see also github.com/Modernizr/Modernizr/issues/146

              attrs.list = !!(document.createElement('datalist') && window.HTMLDataListElement);

            }

            return attrs;

        })('autocomplete autofocus list placeholder max min multiple pattern required step'.split(' '));



        // Run through HTML5's new input types to see if the UA understands any.

        //   This is put behind the tests runloop because it doesn't return a

        //   true/false like all the other tests; instead, it returns an object

        //   containing each input type with its corresponding true/false value



        // Big thanks to @miketaylr for the html5 forms expertise. miketaylr.com/

        Modernizr['inputtypes'] = (function(props) {



            for ( var i = 0, bool, inputElemType, defaultView, len = props.length; i < len; i++ ) {



                inputElem.setAttribute('type', inputElemType = props[i]);

                bool = inputElem.type !== 'text';



                // We first check to see if the type we give it sticks..

                // If the type does, we feed it a textual value, which shouldn't be valid.

                // If the value doesn't stick, we know there's input sanitization which infers a custom UI

                if ( bool ) {



                    inputElem.value         = smile;

                    inputElem.style.cssText = 'position:absolute;visibility:hidden;';



                    if ( /^range$/.test(inputElemType) && inputElem.style.WebkitAppearance !== undefined ) {



                      docElement.appendChild(inputElem);

                      defaultView = document.defaultView;



                      // Safari 2-4 allows the smiley as a value, despite making a slider

                      bool =  defaultView.getComputedStyle &&

                              defaultView.getComputedStyle(inputElem, null).WebkitAppearance !== 'textfield' &&

                              // Mobile android web browser has false positive, so must

                              // check the height to see if the widget is actually there.

                              (inputElem.offsetHeight !== 0);



                      docElement.removeChild(inputElem);



                    } else if ( /^(search|tel)$/.test(inputElemType) ){

                      // Spec doesnt define any special parsing or detectable UI

                      //   behaviors so we pass these through as true



                      // Interestingly, opera fails the earlier test, so it doesn't

                      //  even make it here.



                    } else if ( /^(url|email)$/.test(inputElemType) ) {

                      // Real url and email support comes with prebaked validation.

                      bool = inputElem.checkValidity && inputElem.checkValidity() === false;



                    } else if ( /^color$/.test(inputElemType) ) {

                        // chuck into DOM and force reflow for Opera bug in 11.00

                        // github.com/Modernizr/Modernizr/issues#issue/159

                        docElement.appendChild(inputElem);

                        docElement.offsetWidth;

                        bool = inputElem.value != smile;

                        docElement.removeChild(inputElem);



                    } else {

                      // If the upgraded input compontent rejects the :) text, we got a winner

                      bool = inputElem.value != smile;

                    }

                }



                inputs[ props[i] ] = !!bool;

            }

            return inputs;

        })('search tel url email datetime date month week time datetime-local number range color'.split(' '));

    }





    // End of test definitions

    // -----------------------







    // Run through all tests and detect their support in the current UA.

    // todo: hypothetically we could be doing an array of tests and use a basic loop here.

    for ( var feature in tests ) {

        if ( hasOwnProperty(tests, feature) ) {

            // run the test, throw the return value into the Modernizr,

            //   then based on that boolean, define an appropriate className

            //   and push it into an array of classes we'll join later.

            featureName  = feature.toLowerCase();

            Modernizr[featureName] = tests[feature]();



            classes.push((Modernizr[featureName] ? '' : 'no-') + featureName);

        }

    }



    // input tests need to run.

    Modernizr.input || webforms();





    /**

     * addTest allows the user to define their own feature tests

     * the result will be added onto the Modernizr object,

     * as well as an appropriate className set on the html element

     *

     * @param feature - String naming the feature

     * @param test - Function returning true if feature is supported, false if not

     */

     Modernizr.addTest = function ( feature, test ) {

       if ( typeof feature == 'object' ) {

         for ( var key in feature ) {

           if ( hasOwnProperty( feature, key ) ) {

             Modernizr.addTest( key, feature[ key ] );

           }

         }

       } else {



         feature = feature.toLowerCase();



         if ( Modernizr[feature] !== undefined ) {

           // we're going to quit if you're trying to overwrite an existing test

           // if we were to allow it, we'd do this:

           //   var re = new RegExp("\\b(no-)?" + feature + "\\b");

           //   docElement.className = docElement.className.replace( re, '' );

           // but, no rly, stuff 'em.

           return Modernizr;

         }



         test = typeof test == 'function' ? test() : test;



         docElement.className += ' ' + (test ? '' : 'no-') + feature;

         Modernizr[feature] = test;



       }



       return Modernizr; // allow chaining.

     };





    // Reset modElem.cssText to nothing to reduce memory footprint.

    setCss('');

    modElem = inputElem = null;



    //>>BEGIN IEPP

    // Enable HTML 5 elements for styling in IE & add HTML5 css



    /*! HTML5 Shiv v3.2 | @jon_neal @afarkas @rem | MIT/GPL2 Licensed */

    (function (win, doc) {

        // feature detection: whether the browser supports default html5 styles

        var supportsHtml5Styles = (function(a, docEl, compStyle) {

            var fake, supported, root = doc.body || (fake = docEl.insertBefore(doc.createElement('body'), docEl.firstChild));



            root.insertBefore(a, root.firstChild);



            a.hidden = true;



            supported = (compStyle ? compStyle(a, null) : a.currentStyle).display === 'none';



            root.removeChild(a);



            fake && docEl.removeChild(fake);



            return supported;

        })(doc.createElement('a'), doc.documentElement, win.getComputedStyle);



        // feature detection: whether the browser supports unknown elements

        var supportsUnknownElements = (function (a) {

            a.innerHTML = '<x-element></x-element>';



            return a.childNodes.length === 1;

        })(doc.createElement('a'));



        var call = Date.call;



        var defaultHtml5Elements = 'abbr article aside audio bdi canvas data datalist details figcaption figure footer header hgroup mark meter nav output progress section summary time video';



        var html5 = win.html5 || {};



        // html5 global so that more elements can be shived and also so that existing shiving can be detected on iframes

        // more elements can be added and shived: html5.elements.push('element-name'); html5.shivDocument(document);

        // defaults can be changed before the script is included: html5 = { shivMethods: false, shivCSS: false, elements: 'foo bar' };

        html5 = {

            // a list of html5 elements

            'elements': (typeof html5.elements === 'object') ? html5.elements : (html5.elements || defaultHtml5Elements).split(' '),

            'shivCSS': !(html5.shivCSS === false),

            'shivMethods': !(html5.shivMethods === false),

            'shivDocument': function (scopeDocument) {

                if (!supportsUnknownElements && !scopeDocument.documentShived) {

                    var documentCreateElement = scopeDocument.createElement, documentCreateDocumentFragment = scopeDocument.createDocumentFragment;



                    // shiv the document

                    for (var i = 0, elements = html5.elements, l = elements.length; i < l; ++i) {

                        call.call(documentCreateElement, scopeDocument, elements[i]);

                    }



                    // shiv the document create element method

                    scopeDocument.createElement = function (nodeName) {

                        var element = call.call(documentCreateElement, scopeDocument, nodeName);



                        // shiv only supported elements (supporting children, not namespaced)

                        if (html5.shivMethods && element.canHaveChildren && !(element.xmlns || element.tagUrn)) {

                            html5.shivDocument(element.document);

                        }



                        return element;

                    };



                    // shiv the document create document fragment method

                    scopeDocument.createDocumentFragment = function () {

                        var frag = call.call(documentCreateDocumentFragment, scopeDocument);



                        return (html5.shivMethods) ? html5.shivDocument(frag) : frag;

                    };

                }



                // set the document head variable

                var documentHead = scopeDocument.getElementsByTagName('head')[0];



                // shiv the default html5 styles

                if (html5.shivCSS && !supportsHtml5Styles && documentHead) {

                    var p = scopeDocument.createElement('p');



                    p.innerHTML = 'x<style>' +

                        'article,aside,details,figcaption,figure,footer,header,hgroup,nav,section{display:block}' + // Corrects block display not defined in IE6/7/8/9

                        'audio{display:none}' + // Corrects audio display not defined in IE6/7/8/9

                        'canvas,video{display:inline-block;*display:inline;*zoom:1}' + // Corrects canvas and video display not defined in IE6/7/8/9

                        '[hidden]{display:none}audio[controls]{display:inline-block;*display:inline;*zoom:1}' + // Corrects 'hidden' attribute and audio[controls] display not present in IE7/8/9

                        'mark{background:#FF0;color:#000}' + // Addresses styling not present in IE6/7/8/9

                    '</style>';



                    documentHead.insertBefore(p.lastChild, documentHead.firstChild);

                }



                // set the document as shivved

                scopeDocument.documentShived = true;



                // return the document

                return scopeDocument;

            }

        };



        // expose shiv type

        html5.type = 'default';



        // expose html5

        win.html5 = html5;



        // shiv the document

        html5.shivDocument(doc);

    })(this, document);



    //>>END IEPP



    // Assign private properties to the return object with prefix

    Modernizr._version      = version;



    // expose these for the plugin API. Look in the source for how to join() them against your input

    Modernizr._prefixes     = prefixes;

    Modernizr._domPrefixes  = domPrefixes;

    Modernizr._cssomPrefixes  = cssomPrefixes;

    

    // Modernizr.mq tests a given media query, live against the current state of the window

    // A few important notes:

    //   * If a browser does not support media queries at all (eg. oldIE) the mq() will always return false

    //   * A max-width or orientation query will be evaluated against the current state, which may change later.

    //   * You must specify values. Eg. If you are testing support for the min-width media query use: 

    //       Modernizr.mq('(min-width:0)')

    // usage:

    // Modernizr.mq('only screen and (max-width:768)')

    Modernizr.mq            = testMediaQuery;   

    

    // Modernizr.hasEvent() detects support for a given event, with an optional element to test on

    // Modernizr.hasEvent('gesturestart', elem)

    Modernizr.hasEvent      = isEventSupported; 



    // Modernizr.testProp() investigates whether a given style property is recognized

    // Note that the property names must be provided in the camelCase variant.

    // Modernizr.testProp('pointerEvents')

    Modernizr.testProp      = function(prop){

        return testProps([prop]);

    };        



    // Modernizr.testAllProps() investigates whether a given style property,

    //   or any of its vendor-prefixed variants, is recognized

    // Note that the property names must be provided in the camelCase variant.

    // Modernizr.testAllProps('boxSizing')    

    Modernizr.testAllProps  = testPropsAll;     





    

    // Modernizr.testStyles() allows you to add custom styles to the document and test an element afterwards

    // Modernizr.testStyles('#modernizr { position:absolute }', function(elem, rule){ ... })

    Modernizr.testStyles    = injectElementWithStyles; 





    // Modernizr.prefixed() returns the prefixed or nonprefixed property name variant of your input

    // Modernizr.prefixed('boxSizing') // 'MozBoxSizing'

    

    // Properties must be passed as dom-style camelcase, rather than `box-sizing` hypentated style.

    // Return values will also be the camelCase variant, if you need to translate that to hypenated style use:

    //

    //     str.replace(/([A-Z])/g, function(str,m1){ return '-' + m1.toLowerCase(); }).replace(/^ms-/,'-ms-');

    

    // If you're trying to ascertain which transition end event to bind to, you might do something like...

    // 

    //     var transEndEventNames = {

    //       'WebkitTransition' : 'webkitTransitionEnd',

    //       'MozTransition'    : 'transitionend',

    //       'OTransition'      : 'oTransitionEnd',

    //       'msTransition'     : 'MsTransitionEnd',

    //       'transition'       : 'transitionend'

    //     },

    //     transEndEventName = transEndEventNames[ Modernizr.prefixed('transition') ];

    

    Modernizr.prefixed      = function(prop, obj, elem){

      if(!obj) {

        return testPropsAll(prop, 'pfx');

      } else {

        // Testing DOM property e.g. Modernizr.prefixed('requestAnimationFrame', window) // 'mozRequestAnimationFrame'

        return testPropsAll(prop, obj, elem);

      }

    };







    // Remove "no-js" class from <html> element, if it exists:

    docElement.className = docElement.className.replace(/(^|\s)no-js(\s|$)/, '$1$2') +

                            

                            // Add the new classes to the <html> element.

                            (enableClasses ? ' js ' + classes.join(' ') : '');



    return Modernizr;



})(this, this.document);