去除空格的js 和 使用正…

 原文出自

1.String.prototype.Trim = function()

{

    returnthis.replace(/(^\s*)|(\s*$)/g, "");

}

String.prototype.LTrim = function()

{

    returnthis.replace(/(^\s*)/g, "");

}

String.prototype.Rtrim = function()

{

    returnthis.replace(/(\s*$)/g, "");

}

2.全文匹配替換

var regExp = new RegExp("需要被替換的字符',"g")

var text = "…………";

text = text.replace(regExp , "替換的字符"); 

3.方案

String .prototype.trim = function(){

   var matches =this.match(/^[ \t\n\r]+/);

   var prefixLength =(matches == null) ? 0:matches[0].length;

   matches = this.match(/[\t\r\n]+$/);

   var suffixLength =(matches == null) ? 0:matches[0].length;

   returnthis.slice(prefixLength,this.length-suffixLength);

}