function newImage(imgname) {
	if (document.images) {
		rslt = new Image();
		rslt.src = imgname;
		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) {
		im1 = newImage("image/product_on.gif");
		im2 = newImage("image/knowhow_on.gif");
		im3 = newImage("image/distrubition_on.gif");
		im4 = newImage("image/ourcompany_on.gif");
		im5 = newImage("image/sb_db_distribution_on.gif");
		im6 = newImage("image/sb_db_services_on.gif");
		im7 = newImage("image/sb_kh_casestudies_on.gif");
		im8 = newImage("image/sb_kh_design_on.gif");
		im9 = newImage("image/sb_kh_ergonomics_on.gif");
		im10 = newImage("image/sb_kh_installation_on.gif");
		im11 = newImage("image/sb_kh_planning_on.gif");
		im12 = newImage("image/sb_kh_understanding_on.gif");
		im13 = newImage("image/sb_oc_careers_on.gif");
		im14 = newImage("image/sb_oc_environ_on.gif");
		im15 = newImage("image/sb_oc_history_on.gif");
		im16 = newImage("image/sb_oc_info_on.gif");
		im17 = newImage("image/sb_oc_news_on.gif");
		im18 = newImage("image/sb_oc_sg_on.gif");
		im19 = newImage("image/sb_oc_values_on.gif");
		
		preloadFlag = true;
	}
}