/*! HTML5 Shiv v3 | @jon_neal @afarkas @rem | MIT/GPL2 Licensed */
(function (win, doc) {
// 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'));

// feature detection: whether the browser supports default html5 styles
var supportsHtml5Styles = (function (nav, docEl, compStyle) {
docEl.appendChild(nav);
return (compStyle = (compStyle ? compStyle(nav) : nav.currentStyle).display) && docEl.removeChild(nav) && compStyle === 'block';
})(doc.createElement('nav'), doc.documentElement, win.getComputedStyle);

// 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 with the following code: html5.elements.push('element-name'); shivDocument(document);
var html5 = {
// a list of html5 elements
elements: 'abbr article aside audio bdi canvas data datalist details figcaption figure footer header hgroup mark meter nav output progress section summary time video'.split(' '),

// the shiv function
shivDocument: function (scopeDocument) {
scopeDocument = scopeDocument || doc;

// test if the document has already been shived
if (scopeDocument.documentShived) {
return;
}
scopeDocument.documentShived = true;

// set local variables
var
documentCreateElement = scopeDocument.createElement,
documentCreateDocumentFragment = scopeDocument.createDocumentFragment,
documentHead = scopeDocument.getElementsByTagName('head')[0],
documentCreateElementReplaceFunction = function (m) {
documentCreateElement(m);
};

// shiv for unknown elements
if (!supportsUnknownElements) {
// shiv the document
html5.elements.join(' ').replace(/\w+/g, documentCreateElementReplaceFunction);

// shiv document create element function
scopeDocument.createElement = function (nodeName) {
var element = documentCreateElement(nodeName);
if (element.canHaveChildren){
html5.shivDocument(element.document);
}
return element;
};

// shiv document create element function
scopeDocument.createDocumentFragment = function () {
return html5.shivDocument(documentCreateDocumentFragment());
};
}

// shiv for default html5 styles
if (!supportsHtml5Styles && documentHead) {
var div = documentCreateElement('div');
div.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 (audio[controls] in IE7)
'[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>'].join('');
documentHead.insertBefore(div.lastChild, documentHead.firstChild);
}

// return document (for potential chaining)
return scopeDocument;
}
};

// shiv the document
html5.shivDocument(doc);

win.html5 = html5;
})(this, document);