日期:2014-05-16  浏览次数:20349 次

JS公共方法宝典

1.JS去掉字符串的最后个字符:

var top=str.substr(0, str.length-1);

?

2.计算字符串长度方法

?//计算字符串长度方法
?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;
?};