string-shuffle.js

String.prototype.shuffle = function(){
	var a = this.split(""),
		n = a.length;

	for( var i = n - 1; i > 0; i-- ){
		var j = Math.floor(Math.random() * (i + 1));
		var tmp = a[i];
		a[i] = a[j];
		a[j] = tmp;
	}
	return a.join("");
}