sfHover = function() {
	
	var sfEls = document.getElementById("mainNav").getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {			
			this.className+=" sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
		
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);


<!-- Script afkomstig van Sitemasters.be
  link = new Array() 
  bann = new Array() 
    //Pas hier alles aan, je kan nog extra links en banners toevoegen.
    link[0] = "index.php"; 
    bann[0] = "pics/pic_blad_1.jpg"; 
        
    link[1] = "index.php"; 
    bann[1] = "pics/pic_blad_2.jpg"; 
  
    link[2] = "index.php"; 
    bann[2] = "pics/pic_blad_3.jpg"; 
  
    link[3] = "index.php"; 
    bann[3] = "pics/pic_blad_4.jpg"; 
	
	link[4] = "index.php"; 
    bann[4] = "pics/pic_blad_5.jpg"; 
	
	link[5] = "index.php"; 
    bann[5] = "pics/pic_blad_6.jpg"; 
	
	link[6] = "index.php"; 
    bann[6] = "pics/pic_blad_7.jpg"; 
	
	link[7] = "index.php"; 
    bann[7] = "pics/pic_blad_8.jpg"; 
	
	link[8] = "index.php"; 
    bann[8] = "pics/pic_blad_9.jpg"; 

  var i = Math.floor(Math.random() * bann.length); 

function showbanner() { 
  if(i < bann.length-1){ 
    i ++;
  } 
  else{ 
    i = 0
  } 
  var samen = "<a href='" + link[i] + "' target='main'>" + 
              "<img src='" + bann[i] + "' width='650' height='150' border='0'></a>"; 
         
  if(document.getElementById) { 
    document.getElementById('banner').innerHTML = samen; 
  } 
         
  else if(document.all) { 
    document.all[banner].innerHTML=samen; 
  } 
  
  setTimeout('showbanner()',15000); 
 } 
  
window.onload = showbanner ();
// einde script -->