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js里面有去除字符串两端空格的函数吗？
没有,需要自己写
<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 = " fason ";
alert(str.Trim());
</script>
//=============================================
//Purpose: Trim left spaces
//=============================================
function jsLTrim(str){
var rtnStr;
rtnStr=""
for (var i=0;i<str.length;i++){
if (str.charAt(i)!=" "){
rtnStr=str.substr(i);
break;
}
}
return rtnStr;
}
//==========================================
//Purpose: Trim right spaces
//==========================================
function jsRTrim(str){
var rtnStr;
rtnStr=""
for (var i=str.length-1;i>=0;i--){
if (str.charAt(i)!=" "){
rtnStr=str.substring(0,i+1);
break;
}
}
return rtnStr;
}
//==========================================
//Purpose: Trim both left and right spaces
//==========================================
function jsTrim(str){
return(jsLTrim(jsRTrim(str)));
}
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, "");}
