var Pic = new Array();
Pic[0] = '/images/v2/TopImage1.jpg';
Pic[1] = '/images/v2/TopImage2.jpg';
Pic[2] = '/images/v2/TopImage3.jpg';
Pic[3] = '/images/v2/TopImage4.jpg';
Pic[4] = '/images/v2/TopImage5.jpg';

var p = Pic.length;
var i = 0;

var preLoad = new Array();
for (i = 0; i < p; i++){
   preLoad[i] = new Image();
   preLoad[i].src = Pic[i];
}

function displayBanner(){
      setTimeout('changeBanner()', 5000);
}

function changeBanner(){

   var j = 0;
   j = Math.floor(Pic.length*Math.random());

   if (document.getElementById("topbanner")!=null){
      document.getElementById("topbanner").style.background = 'url(' + Pic[j] + ')';
      setTimeout('changeBanner()', 5000);
   }
}