codice:
Array.prototype.shuffle = function()
{
	var a = this.slice(), b = [];
	for (var i = 0; i < this.length; i++) {
		var n = random(a.length);
		b.push(a[n]);a.splice(n, 1);
	}
	return b;
};

mioArray = [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19];
trace(mioArray);
trace(mioArray.shuffle());