js空格处理函数

1 <script language="javascript">
2 String.prototype.trim=function(){
3 return this.replace(/(^/s*)|(/s*$)/g, "");
4 }
5 String.prototype.ltrim=function(){
6 return this.replace(/(^/s*)/g,"");
7 }
8 String.prototype.rtrim=function(){
9 return this.replace(/(/s*$)/g,"");
10 }
11
12 function test(){
13 var strWithSpace = ' 12345 ';
14 window.alert(strWithSpace+"_"+strWithSpace.length);
15
16 strWithSpace = strWithSpace.trim();
17 window.alert(strWithSpace+"_"+strWithSpace.length);
18 }
19
20 window.onload = test ;
21 </script>