Trim Strings In JavaScript

Okay, so you want to trim a string in JavaScript/JScript/EcmaScript, but you find that the functionality just isn't built in.  Here's a quick little snippet that will add said functionality pretty easily.

if (!String.prototype.trim)
    String.prototype.trim = function() {
        return this.toString().replace(/^[\s\r\n]*([\w\W]*?)[\s\r\n]*$/, "$1");
}

Also... here's a library for extending JS's Date class.

In addition to these little quickies, take a look at prototype.js or jQuery. Both of these frameworks provide some cool things, and though they overlap in terms of functionality, both work very well.