JS 截取字符串的空格

JS 截取字符串的空格 

Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--><SCRIPT LANGUAGE="JavaScript"> 
<!-- 
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>

Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->//js去除空格函数
//此处为string类添加三个成员
String.prototype.Trim = function(){ return Trim(this);}
String.prototype.LTrim = function(){return LTrim(this);}
String.prototype.RTrim = function(){return RTrim(this);}

//此处为独立函数
function LTrim(str)
{
    var i;
    for(i=0;i<str.length;i++)
    {
        if(str.charAt(i)!=" "&&str.charAt(i)!=" ")break;
    }
    str=str.substring(i,str.length);
    return str;
}
function RTrim(str)
{
    var i;
    for(i=str.length-1;i>=0;i--)
    {
        if(str.charAt(i)!=" "&&str.charAt(i)!=" ")break;
    }
    str=str.substring(0,i+1);
    return str;
}
function Trim(str)
{
    return LTrim(RTrim(str));
}