Improved logic of cc.path._normalize

CCBoot.js

@@ -365,6 +365,8 @@ cc.async = /** @lends cc.async# */{
  * @class
  */
 cc.path = /** @lends cc.path# */{
+    normalizeRE: /[^\.\/]+\/\.\.\//,
+
     /**
      * Join strings to be a path.
      * @example
@@ -502,21 +504,15 @@ cc.path = /** @lends cc.path# */{
         index = index <= 0 ? 0 : index + 1;
         return pathStr.substring(0, index) + basename + ext + tempStr;
     },
-    //todo Open up after verification
+    //todo make public after verification
     _normalize: function(url){
-        url = String(url);
-        var status = true;
-        var repFunc = function(){
-            status = true;
-            return "";
-        };
-        //remove ../
-        while(status){
-            status = false;
-            url = url.replace(/[^\.\/]+\/\.\.\//, repFunc);
-        }
-        //remove ./
-        url = url.replace(/\/\.\//g, "/");
+        var oldUrl = url = String(url);
+
+        //removing all ../
+        do {
+            oldUrl = url;
+            url = url.replace(this.normalizeRE, "");
+        } while(oldUrl.length !== url.length);
         return url;
     }
 };