javascript 函数原型

string .length 汉字为两个字符处理

.Tlength

<script>

/*

This following code are designed and writen by Windy_sk <seasonx@163.net>

You can use it freely, but u must held all the copyright items!

*/

//测字符串实际长度

String.prototype.Tlength = function(){var arr=this.match(/[^\x00-\xff]/ig);return this.length+(arr==null?0:arr.length);}

//字符串左取

String.prototype.left = function(num,mode){if(!/\d+/.test(num))return(this);var str = this.substr(0,num);if(!mode) return str;var n = str.Tlength() - str.length;num = num - parseInt(n/2);return this.substr(0,num);}

//字符串右取

String.prototype.right = function(num,mode){if(!/\d+/.test(num))return(this);var str = this.substr(this.length-num);if(!mode) return str;var n = str.Tlength() - str.length;num = num - parseInt(n/2);return this.substr(this.length-num);}

//字符串包含

String.prototype.GetCount = function(str,mode){return eval("this.match(/("+str+")/g"+(mode?"i":"")+").length");}

//字符串去除两端空字符

String.prototype.Trim=function(){return this.replace(/(^\s*)(\s*$)/g,"");}

String.prototype.Ltrim = function(){return this.replace(/(^\s*)/g, "");}

String.prototype.Rtrim = function(){return this.replace(/(\s*$)/g, "");}

document.write("'aa啦啦aa'.Tlength() = " + "aa啦啦aa".Tlength());

document.write("<br>");

document.write("'aabbcc'.Tlength() = " + "aabbcc".Tlength());

document.write("<br>");

document.write("'aa啦啦aa'.left(4) = " + "aa啦啦aa".left(4));

document.write("<br>");

document.write("'aa啦啦aa'.left(4,true) = " + "aa啦啦aa".left(4,true));

document.write("<br>");

document.write("'aa啦啦aa'.right(4) = " + "aa啦啦aa".right(4));

document.write("<br>");

document.write("'aa啦啦aa'.right(4,true) = " + "aa啦啦aa".right(4,true));

document.write("<br>");

document.write("'abAcae'.GetCount('a') = " + "abAcae".GetCount("a"));

document.write("<br>");

document.write("'abAcae'.GetCount('a',true) = " + "abAcae".GetCount("a",true));

document.write("<br>");

document.write("' abc de '.Ltrim() = " + " abc de ".Ltrim());

document.write("<br>");

document.write("' abc de '.Rtrim() = " + " abc de ".Rtrim());

document.write("<br>");

document.write("' abc de '.Trim() = " + " abc de ".Trim());

</script>

再来几个函数，getCookie(),getQuery(),DateDiff(),DateAdd(),b2s()，原+改

function getCookie(mainKey,subKey) {

var reg = new RegEXP("(^ )"+mainKey+"=([^;]*)(;$)");

var arr = document.cookie.match(reg);

if (arguments.length == 2) {

if (arr!=null)

return key(subKey,arr[2]);

else