/**
* @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));