javascript去除字符串空格的函数

<script language=Javascript>
//自己动手为string添加Trim
//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, "");}
var str=" abc cd ";

//先去掉半角空格
str=str.replace(/(^/s*)|(/s*$)/g,"");
alert("head"+str+"end" );

//再去掉全角空格
str=str.replace(/^( )+|^[/s　]+|( )+$|[/s　]+$/g, "")
alert("head"+str+"end" );
</script>

正则表达式是个好东东，以后得花时间学学！