<script language=vbscript>
function vbsTrim(str)
vbsTrim = trim(str)
end function
</script><script language=javascript>
alert(vbsTrim("  以JS里调用VBS的trim函数  "));
</script>
<script language=Javascript>  //自己动手为string添加Trim
function String.prototype.Trim() {return this.replace(/(^\s*)|(\s*$)/g,"");}
function String.prototype.Ltrim(){return this.replace(/(^\s*)/g, "");}
function String.prototype.Rtrim(){return this.replace(/(\s*$)/g, "");}
var str = "  meizz    ";
alert(str.Trim());
</script>