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];
				document.getElementById(changeImages.arguments[i]).src = changeImages.arguments[i+1];
				
			}
		}
	}
	
	var preloadFlag = false;
	function preloadImages() {
		if (document.images) {
			var logoImage_04 = newImage("images/logo/logo_hover_04.png");
			var logoImage_05 = newImage("images/logo/logo_hover_05.png");
			var logoImage_07 = newImage("images/logo/logo_hover_07.png");
			var logoImage_08 = newImage("images/logo/logo_hover_08.png");
			var logoImage_08 = newImage("images/logo/logo_hover_08.png");
			var button_onderwijs = newImage("images/buttons/onderwijs_hover.png");
			var button_over10training = newImage("images/buttons/over10training_hover.png");
			var button_contact = newImage("images/buttons/contact_hover.png");
			var button_home = newImage("images/buttons/home_hover.png");
			preloadFlag = true;
		}
	}