String Add Trim,ltrim,rtrim

Source: Internet
Author: User
Tags rtrim trim
Using the prototype property of each object in JavaScript, we can add our own methods and properties to the built-in objects in JavaScript.

Here's how we use this property to add three methods to a String object: Trim,ltrim,rtrim (acting like a function with the same name in VBScript)

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, "");
}
How, simple, look at one of the examples used:

$#@60;script language=javascript$#@62;
String.prototype.Trim = function ()
{
Return This.replace (/(^\s*) | ( \s*$)/g, "");
}
 
var s = "Leading and trailing spaces";
 
Window.alert (S + "(" + s.length +) ");
 
s = S.trim ();
 
Window.alert (S + "(" + s.length +) ");
 
$#@60;/script$#@62;


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