String Add Trim,ltrim,rtrim

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;