function popup(sPicURL) {
    window.open( "/popup.php?"+sPicURL, "",  
    "toolbar=0,scrollbars=0,statusbar=1,menubar=1,resizable=0,height=500,width=500,left=25,top=25");
  }

function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		navigatie_02_over = newImage("img/navigatie_02-over.gif");
		navigatie_03_over = newImage("img/navigatie_03-over.gif");
		navigatie_04_over = newImage("img/navigatie_04-over.gif");
		navigatie_05_over = newImage("img/navigatie_05-over.gif");
		navigatie_06_over = newImage("img/navigatie_06-over.gif");
		navigatie_07_over = newImage("img/navigatie_07-over.gif");
		navigatie_08_over = newImage("img/navigatie_08-over.gif");
		navi_rb_02_over = newImage("img/navi-rb_02-over.gif");
		navi_rb_03_over = newImage("img/navi-rb_03-over.gif");
		navi_rb_04_over = newImage("img/navi-rb_04-over.gif");
		navi_rb_05_over = newImage("img/navi-rb_05-over.gif");
		preloadFlag = true;
	}
}