方法一:
var jmz = {};
jmz.GetLength = function(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;
};alert(jmz.GetLength('测试测试ceshiceshi));方法二:
var l = str.length;
var blen = 0;
for(i=0; i<l; i++) {
if ((str.charCodeAt(i) & 0xff00) != 0) {
blen ++;}blen ++;}方法三:
var jmz = {};
jmz.GetLength = function(str) {
return str.replace(/[\u0391-\uFFE5]/g,"aa").length; //先把中文替换成两个字节的英文,在计算长度
}; alert(jmz.GetLength('测试测试ceshiceshi'));