/**
   * implement Object.create for browsers without native support
   */
  if (typeof Object.create !== 'function') {
  	Object.create = function (o) {
  		function F() {}
  		F.prototype = o;
  		return new F();
  	};
  }
  
  /**
   * implement Object.keys for browsers without native support
   */
  if (typeof Object.keys !== 'function') {
  	Object.keys = function(o) {
  		if (o !== Object(o)) {
  			throw new TypeError('Object.keys called on a non-object');
  		}
  		var k=[],p;
  		for (p in o) {
  			if (Object.prototype.hasOwnProperty.call(o,p)) {
  				k.push(p);
  			}
  		}
  		return k;
  	};
  }
  
  /**
   * implement Array.filter for browsers without native support
   */
  if (!Array.prototype.filter) {
  	Array.prototype.filter = function(fun /*, thisp*/) {
  		var len = this.length >>> 0;
  		if (typeof fun !== "function"){
  			throw new TypeError();
  		}
  
  		var res = [];
  		var thisp = arguments[1];
  		for (var i = 0; i < len; i++) {
  			if (i in this) {
  				var val = this[i]; // in case fun mutates this

  				if (fun.call(thisp, val, i, this)) {

  					res.push(val);

  				}

  			}
  		}
  		return res;
  	};
  }
  
  /**
   * implement Array.indexOf for browsers without native support
   */
  if (!Array.prototype.indexOf){
  	Array.prototype.indexOf = function(elt /*, from*/)
  	{
  		var len = this.length;
  
  		var from = Number(arguments[1]) || 0;
  		from = (from < 0) ? Math.ceil(from) : Math.floor(from);
  		if (from < 0){
  			from += len;
  		}
  
  		for (; from < len; from++)
  		{
  			if (from in this && this[from] === elt){
  				return from;
  			}
  		}
  		return -1;
  	};
  }
  
  /**
   * implement Array.map for browsers without native support
   */
  if (!Array.prototype.map){
  	Array.prototype.map = function(fun /*, thisp */){
  		"use strict";
  
  		if (this === void 0 || this === null){
  			throw new TypeError();
  		}
  
  		var t = Object(this);
  		var len = t.length >>> 0;
  		if (typeof fun !== "function"){
  			throw new TypeError();
  		}
  
  		var res = new Array(len);
  		var thisp = arguments[1];
  		for (var i = 0; i < len; i++){
  			if (i in t){
  				res[i] = fun.call(thisp, t[i], i, t);
  			}
  		}
  
  		return res;
  	};
  }

  
  //https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Function/bind
  if (!Function.prototype.bind) {
  	Function.prototype.bind = function (oThis) {
  		if (typeof this !== "function") {
  			// closest thing possible to the ECMAScript 5 internal IsCallable function
  			throw new TypeError("Function.prototype.bind - what is trying to be bound is not callable");
  		}
  
  		var aArgs = Array.prototype.slice.call(arguments, 1),
  			fToBind = this,
  			fNOP = function () {},
  			fBound = function () {
  				return fToBind.apply(this instanceof fNOP && oThis
  					? this
  					: oThis,
  					aArgs.concat(Array.prototype.slice.call(arguments)));
  			};
  
  		fNOP.prototype = this.prototype;
  		fBound.prototype = new fNOP();
  
  		return fBound;
  	};
  }
  
  //https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/String/Trim
  if(!String.prototype.trim) {
  	String.prototype.trim = function () {
  		return this.replace(/^\s+|\s+$/g,'');
  	};

  }
  
  // Older Firefoxes doesn't support outerHTML
  // From http://stackoverflow.com/questions/1700870/how-do-i-do-outerhtml-in-firefox#answer-3819589
  function outerHTML(node){
  	// In newer browsers use the internal property otherwise build a wrapper.
  	return node.outerHTML || (
  	function(n){
  		var div = document.createElement('div'), h;
  		div.appendChild( n.cloneNode(true) );
  		h = div.innerHTML;
  		div = null;
  		return h;
  	})(node);
  }

  
  // devicePixelRatio for IE10
  window.devicePixelRatio = window.devicePixelRatio ||
  	window.screen.deviceXDPI / window.screen.logicalXDPI || 1;