Fix a bug in env-js re. insertBefore.

lib/env-js/envjs/dom.js

@@ -191,6 +191,7 @@ __insertBefore__ = function(nodelist, newChild, refChildIndex) {
         else {
             // append the newChild
             Array.prototype.splice.apply(nodelist,[refChildIndex, 0, newChild]);
+			__addToIndexes__(newChild, nodelist.parentNode);
         }
     }
 };