var ic = 4;     // Number of alternative images
var xoxo = new Array(ic);  // Array to hold filenames
        
xoxo[0] = "images/bnr01.jpg";
xoxo[1] = "images/bnr02.jpg";
xoxo[2] = "images/bnr03.jpg";
xoxo[3] = "images/bnr04.jpg";

function pickRandom(range) {
	if (Math.random)
		return Math.round(Math.random() * (range-1));
	else {
	var now = new Date();
	return (now.getTime() / 1000) % range;
	}
}
var choice = pickRandom(ic);