js 去空[转]

<SCRIPT LANGUAGE="JavaScript">
<!--   //出处:网上搜集   // Trim() , Ltrim() , RTrim() 
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, "");    }  
//
-->   </SCRIPT>   

<input type="text" value="   前后都是空格    " id="space"> 
<input type="button" value="去前后空格" onclick="javascript:document.getElementById('space').value=document.getElementById('space').value.Trim();
document.getElementById('space').select();">  
<input type="button" value="去前空格" onclick="javascript:document.getElementById('space').value=document.getElementById('space').value.LTrim();
document.getElementById('space').select();">  
<input type="button" value="去后空格" onclick="javascript:document.getElementById('space').value=document.getElementById('space').value.RTrim();document.getElementById('space').select();">  
<input type="button" value="还原" onclick="javascript:document.getElementById('space').value='     前后都是空格    ';">  
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