Uppercase first letter of variable

Question

I have searched over the web can can\'t find anything to help me. I want to make the first letter of each word upper case within a variable.

So far i have tried:

Answer 1

Building on @peter-olson's answer, I took a more object oriented approach without jQuery:

String.prototype.ucwords = function() {
    return this.toLowerCase().replace(/\b[a-z]/g, function(letter) {
        return letter.toUpperCase();
    });
}

alert("hello world".ucwords()); //Displays "Hello World"

Example: http://jsfiddle.net/LzaYH/1/