// lezgo ...
function starter(){	preload(); replacedivs(); }

// replace divs to center and scrollbar settings
function replacedivs(){
	var sizew = document.body.offsetWidth;
	var leftpl = sizew - 785;
		if (leftpl * 0.5 > -10){
			nuldiv.style.left = leftpl * 0.5;
		} else {
			nuldiv.style.left = -1;
		}
	document.body.scroll="auto";
	swapshow(nuldiv,'visible');
}

// make divs hide and reveal
function swapshow(div,onoff){div.style.visibility=onoff;}

// preload images
var preloadImages = new Array('navmain_home_on.gif', 'navmain_overons_on.gif', 'navmain_programma_on.gif', 'navmain_berigten_on.gif', 'navmain_contact_on.gif'); 

function loadImage(imgSrc) {
  var imgObj = new Image();
  imgObj.src = 'images/'+imgSrc;
}

function preload() {
  for (var i=0;i<preloadImages.length;i++) { loadImage(preloadImages[i]); }
}