/**

* @preserve HTML5 Shiv 3.7.3 | @afarkas @jdalton @jon_neal @rem | MIT/GPL2 Licensed

*/

;(function(window, document) {

/*jshint evil:true */

  /** version */

  var version = '3.7.3';

  /** 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|DocumentFragment} 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);

  if(typeof module == 'object' && module.exports){

    module.exports = html5;

  }

}(typeof window !== "undefined" ? window : this, document));