/**
 * @preserve HTML5 Shiv 3.7.2 | @afarkas @jdalton @jon_neal @rem | MIT/GPL2 Licensed
 */
;(function(window, document) {
    /*jshint evil:true */
    /** version */
    var version = '3.7.2';

    /** Preset options */
    var options = window.html5 || {};

    /** Used to skip problem elements */
    var reSkip = /^<|^(?:button|map|select|textarea|object|iframe|option|optgroup)$/i;

    /** Not all elements can be cloned in IE **/
    var saveClones = /^(?:a|b|code|div|fieldset|h1|h2|h3|h4|h5|h6|i|label|li|ol|p|q|span|strong|style|table|tbody|td|th|tr|ul)$/i;

    /** Detect whether the browser supports default html5 styles */
    var supportsHtml5Styles;

    /** Name of the expando, to work with multiple documents or to re-shiv one document */
    var expando = '_html5shiv';

    /** The id for the the documents expando */
    var expanID = 0;

    /** Cached data for each document */
    var expandoData = {};

    /** Detect whether the browser supports unknown elements */
    var supportsUnknownElements;

    (function() {
        try {
            var a = document.createElement('a');
            a.innerHTML = '<xyz></xyz>';
            //if the hidden property is implemented we can assume, that the browser supports basic HTML5 Styles
            supportsHtml5Styles = ('hidden' in a);

            supportsUnknownElements = a.childNodes.length == 1 || (function() {
                // assign a false positive if unable to shiv
                (document.createElement)('a');
                var frag = document.createDocumentFragment();
                return (
                typeof frag.cloneNode == 'undefined' ||
                typeof frag.createDocumentFragment == 'undefined' ||
                typeof frag.createElement == 'undefined'
                );
            }());
        } catch(e) {
            // assign a false positive if detection fails => unable to shiv
            supportsHtml5Styles = true;
            supportsUnknownElements = true;
        }

    }());

    /*--------------------------------------------------------------------------*/

    /**
     * Creates a style sheet with the given CSS text and adds it to the document.
     * @private
     * @param {Document} ownerDocument The document.
     * @param {String} cssText The CSS text.
     * @returns {StyleSheet} The style element.
     */
    function addStyleSheet(ownerDocument, cssText) {
        var p = ownerDocument.createElement('p'),
            parent = ownerDocument.getElementsByTagName('head')[0] || ownerDocument.documentElement;

        p.innerHTML = 'x<style>' + cssText + '</style>';
        return parent.insertBefore(p.lastChild, parent.firstChild);
    }

    /**
     * Returns the value of `html5.elements` as an array.
     * @private
     * @returns {Array} An array of shived element node names.
     */
    function getElements() {
        var elements = html5.elements;
        return typeof elements == 'string' ? elements.split(' ') : elements;
    }

    /**
     * Extends the built-in list of html5 elements
     * @memberOf html5
     * @param {String|Array} newElements whitespace separated list or array of new element names to shiv
     * @param {Document} ownerDocument The context document.
     */
    function addElements(newElements, ownerDocument) {
        var elements = html5.elements;
        if(typeof elements != 'string'){
            elements = elements.join(' ');
        }
        if(typeof newElements != 'string'){
            newElements = newElements.join(' ');
        }
        html5.elements = elements +' '+ newElements;
        shivDocument(ownerDocument);
    }

    /**
     * Returns the data associated to the given document
     * @private
     * @param {Document} ownerDocument The document.
     * @returns {Object} An object of data.
     */
    function getExpandoData(ownerDocument) {
        var data = expandoData[ownerDocument[expando]];
        if (!data) {
            data = {};
            expanID++;
            ownerDocument[expando] = expanID;
            expandoData[expanID] = data;
        }
        return data;
    }

    /**
     * returns a shived element for the given nodeName and document
     * @memberOf html5
     * @param {String} nodeName name of the element
     * @param {Document} ownerDocument The context document.
     * @returns {Object} The shived element.
     */
    function createElement(nodeName, ownerDocument, data){
        if (!ownerDocument) {
            ownerDocument = document;
        }
        if(supportsUnknownElements){
            return ownerDocument.createElement(nodeName);
        }
        if (!data) {
            data = getExpandoData(ownerDocument);
        }
        var node;

        if (data.cache[nodeName]) {
            node = data.cache[nodeName].cloneNode();
        } else if (saveClones.test(nodeName)) {
            node = (data.cache[nodeName] = data.createElem(nodeName)).cloneNode();
        } else {
            node = data.createElem(nodeName);
        }

        // Avoid adding some elements to fragments in IE < 9 because
        // * Attributes like `name` or `type` cannot be set/changed once an element
        //   is inserted into a document/fragment
        // * Link elements with `src` attributes that are inaccessible, as with
        //   a 403 response, will cause the tab/window to crash
        // * Script elements appended to fragments will execute when their `src`
        //   or `text` property is set
        return node.canHaveChildren && !reSkip.test(nodeName) && !node.tagUrn ? data.frag.appendChild(node) : node;
    }

    /**
     * returns a shived DocumentFragment for the given document
     * @memberOf html5
     * @param {Document} ownerDocument The context document.
     * @returns {Object} The shived DocumentFragment.
     */
    function createDocumentFragment(ownerDocument, data){
        if (!ownerDocument) {
            ownerDocument = document;
        }
        if(supportsUnknownElements){
            return ownerDocument.createDocumentFragment();
        }
        data = data || getExpandoData(ownerDocument);
        var clone = data.frag.cloneNode(),
            i = 0,
            elems = getElements(),
            l = elems.length;
        for(;i<l;i++){
            clone.createElement(elems[i]);
        }
        return clone;
    }

    /**
     * Shivs the `createElement` and `createDocumentFragment` methods of the document.
     * @private
     * @param {Document|DocumentFragment} ownerDocument The document.
     * @param {Object} data of the document.
     */
    function shivMethods(ownerDocument, data) {
        if (!data.cache) {
            data.cache = {};
            data.createElem = ownerDocument.createElement;
            data.createFrag = ownerDocument.createDocumentFragment;
            data.frag = data.createFrag();
        }


        ownerDocument.createElement = function(nodeName) {
            //abort shiv
            if (!html5.shivMethods) {
                return data.createElem(nodeName);
            }
            return createElement(nodeName, ownerDocument, data);
        };

        ownerDocument.createDocumentFragment = Function('h,f', 'return function(){' +
            'var n=f.cloneNode(),c=n.createElement;' +
            'h.shivMethods&&(' +
                // unroll the `createElement` calls
            getElements().join().replace(/[\w\-:]+/g, function(nodeName) {
                data.createElem(nodeName);
                data.frag.createElement(nodeName);
                return 'c("' + nodeName + '")';
            }) +
            ');return n}'
        )(html5, data.frag);
    }

    /*--------------------------------------------------------------------------*/

    /**
     * Shivs the given document.
     * @memberOf html5
     * @param {Document} ownerDocument The document to shiv.
     * @returns {Document} The shived document.
     */
    function shivDocument(ownerDocument) {
        if (!ownerDocument) {
            ownerDocument = document;
        }
        var data = getExpandoData(ownerDocument);

        if (html5.shivCSS && !supportsHtml5Styles && !data.hasCSS) {
            data.hasCSS = !!addStyleSheet(ownerDocument,
                // corrects block display not defined in IE6/7/8/9
                'article,aside,dialog,figcaption,figure,footer,header,hgroup,main,nav,section{display:block}' +
                    // adds styling not present in IE6/7/8/9
                'mark{background:#FF0;color:#000}' +
                    // hides non-rendered elements
                'template{display:none}'
            );
        }
        if (!supportsUnknownElements) {
            shivMethods(ownerDocument, data);
        }
        return ownerDocument;
    }

    /*--------------------------------------------------------------------------*/

    /**
     * The `html5` object is exposed so that more elements can be shived and
     * existing shiving can be detected on iframes.
     * @type Object
     * @example
     *
     * // options can be changed before the script is included
     * html5 = { 'elements': 'mark section', 'shivCSS': false, 'shivMethods': false };
     */
    var html5 = {

        /**
         * An array or space separated string of node names of the elements to shiv.
         * @memberOf html5
         * @type Array|String
         */
        'elements': options.elements || 'abbr article aside audio bdi canvas data datalist details dialog figcaption figure footer header hgroup main mark meter nav output picture progress section summary template time video',

        /**
         * current version of html5shiv
         */
        'version': version,

        /**
         * A flag to indicate that the HTML5 style sheet should be inserted.
         * @memberOf html5
         * @type Boolean
         */
        'shivCSS': (options.shivCSS !== false),

        /**
         * Is equal to true if a browser supports creating unknown/HTML5 elements
         * @memberOf html5
         * @type boolean
         */
        'supportsUnknownElements': supportsUnknownElements,

        /**
         * A flag to indicate that the document's `createElement` and `createDocumentFragment`
         * methods should be overwritten.
         * @memberOf html5
         * @type Boolean
         */
        'shivMethods': (options.shivMethods !== false),

        /**
         * A string to describe the type of `html5` object ("default" or "default print").
         * @memberOf html5
         * @type String
         */
        'type': 'default',

        // shivs the document according to the specified `html5` object options
        'shivDocument': shivDocument,

        //creates a shived element
        createElement: createElement,

        //creates a shived documentFragment
        createDocumentFragment: createDocumentFragment,

        //extends list of elements
        addElements: addElements
    };

    /*--------------------------------------------------------------------------*/

    // expose html5
    window.html5 = html5;

    // shiv the document
    shivDocument(document);

}(this, document));