JS go space, Trim () method use

----------------------------------js to the space---------------------------
Remove the left and right side of the string space, in VBScript can easily use trim, ltrim or RTrim, but in JS there are no 3 built-in methods, you need to manually write. The following implementation method uses the regular expression, the efficiency is good, and the three methods are added to the string object's built-in method.

The method format for the class is as follows: (Str.trim ();)

<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>
A function can be written like this: (Trim (str))
<script type= "Text/javascript" >
function Trim (str) {//delete left and right spaces
R

JS go space, Trim () method use