JS 正则表达式 去字符串空格

JS 去字符串空格 总结

str为要去除空格的字符串:
去除所有空格:

str   =   str.replace(/\s+/g,"");    

去除两头空格:

str   =   str.replace(/^\s+|\s+$/g,""); 

去除左空格：

str=str.replace( /^\s*/, ''); 

去除右空格：

str=str.replace(/(\s*$)/g, ""); 

去除空格(TimeSheet用过)

arg0=arg0.replace(/\s+$|^\s+/g,"");

<script type="text/javascript">          
Trim() , Ltrim() , RTrim()    
String.prototype.Trim = function(){    
    returnthis.replace(/(^\s*)|(\s*$)/g, "");    
}    
String.prototype.LTrim = function(){    
    returnthis.replace(/(^\s*)/g, "");    
}    
String.prototype.RTrim = function(){    
    returnthis.replace(/(\s*$)/g, "");    
}       
</script >  

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