      *  @productversion Flex 3
      */
     public function Binding(document:Object, srcFunc:Function,
-						    destFunc:Function, destString:String)
+						    destFunc:Function, destString:String,
+							srcString:String = null)
     {
 		super();
 

        }

        element[chain[i]] = value;
    }

    /**

        this.srcFunc = srcFunc;
        this.destFunc = destFunc;
        this.destString = destString;
        this.srcString = srcString;

        if (this.srcFunc == null)
        {
            this.srcFunc = defaultSrcFunc;
        }

        if (this.destFunc == null)
        {
