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) {
				startpagina_over = newImage("images/startpagina_over.jpg");
				wiezijnwe_over = newImage("images/wiezijnwe_over.jpg");
				vestigingen_over = newImage("images/vestigingen_over.jpg");
				producten_over = newImage("images/producten_over.jpg");
				surpluskaart_over = newImage("images/surpluskaart_over.jpg");
				surplusmagazine_over = newImage("images/surplusmagazine_over.jpg");
				vacatures_over = newImage("images/vacatures_over.jpg");
				links_over = newImage("images/links_over.jpg");
		        preloadFlag = true;
	        }
        }