Fixed #77 Fails on Internet Explorer

index.js

@@ -83,7 +83,7 @@ Pjax.prototype = {
   },
 
   loadContent: function(html, options) {
-    var tmpEl = document.implementation.createHTMLDocument("")
+    var tmpEl = document.implementation.createHTMLDocument("pjax")
 
     // parse HTML attributes to copy them
     // since we are forced to use documentElement.innerHTML (outerHTML can't be used for <html>)