function GetLength(str) {
            ///<summary>获得字符串实际长度，中文2，英文1</summary>
            ///<param name="str">要获得长度的字符串</param>
            var realLength = 0, len = str.length, charCode = -1;
            for (var i = 0; i < len; i++) {
                charCode = str.charCodeAt(i);
                if (charCode >= 0 && charCode <= 128)
                    realLength += 1;
                else
                    realLength += 2;
            }
            return realLength;
        };