javascript实现trim&#3..

时间：2010-10-15 来源：xharvard

javascript中没有对字符串的前,后空格去除的方法,最近项目需要,所以自己写了一个,感觉还不错,拿出来和大家分享.

<html>
<head>
<script language="javascript">
String.prototype.ltrim = function(){return this.replace(/(^\s*)/g,"");}
String.prototype.rtrim = function(){return this.replace(/(\s*$)/g,"");}
String.prototype.trim = function(){return this.replace(/(^\s*)|(\s*$)/g, "");}
function change(){
var strTmp = document.getElementById("text1").value;
var strL = strTmp.ltrim();
var strR = strTmp.rtrim();
var str = strTmp.trim();
document.getElementById("text2").value = strL;
document.getElementById("text3").value = strR;
document.getElementById("text4").value = str;
}
</script>
</head>
<body>
with space string:<input type="text" name="text1" id="text1" value=" aaa "/><br>
trim left space:<input type="text" name="text2" id="text2" value=""/><br>
trim right space:<input type="text" name="text3" id="text3" value=""/><br>
trim left and right sapce: <input type="text" name="text4" id="text4" value=""/><br>
<input type="button" value="CLICK" onclick="change()"/>
</body>
</html>