var ic = 3; 

var arnie = new Array(ic); 

arnie[0] = "images/header/top-01.jpg";
arnie[1] = "images/header/top-02.jpg";
arnie[2] = "images/header/top-03.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);