Non repeating random images

[Larry Lanscott]

I want to display 4 random images but not have duplicates. So if image one is "aceclubs.p ng" I don't want image two to be the same thing.
I've been duplicating this script with different function names for all four images, but sometimes they return the same image and I don't want that. Is there a way to put it all in one function?

(sorry for the newbiness of this question and/or bad formatting of the code. I'm new to this)
Any help greatly appreciated.

function random_cards(){

	var cardace = new Array(4)

	cardace[0] = "aceclubs.png";
	cardace[1] = "acediamonds.png";
	cardace[2] = "acehearts.png";
	cardace[3] = "acespades.png";

	var randomace = Math.floor(Math.random()*cardace.length);

	var ace = cardace[randomace];

	card1.src=ace

[RamananKalirajan]

Hi,
Your script for generating a rondom number works fine. I want to know about the vaiable card1. Have you defined this variable globally?

Thanks and Regards
Ramanan Kalirajan