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) {
		bt_aboutUs_over = newImage("images/bt_aboutUs-over.gif");
		bt_aboutUs_bt_installationdismantle_over = newImage("images/bt_aboutUs-bt_installationd.gif");
		bt_installationdismantle_bt_aboutUs_over = newImage("images/bt_installationdismantle-bt.gif");
		bt_installationdismantle_over = newImage("images/bt_installationdismantle-ov.gif");
		bt_installationdismantle_bt_generalcontracting_over = newImage("images/bt_installationdismantle-10.gif");
		bt_generalcontracting_bt_installationdismantle_over = newImage("images/bt_generalcontracting-bt_in.gif");
		bt_generalcontracting_over = newImage("images/bt_generalcontracting-over.gif");
		bt_generalcontracting_bt_willworkuniversity_over = newImage("images/bt_generalcontracting-bt_wi.gif");
		bt_willworkuniversity_bt_generalcontracting_over = newImage("images/bt_willworkuniversity-bt_ge.gif");
		bt_willworkuniversity_over = newImage("images/bt_willworkuniversity-over.gif");
		bt_willworkuniversity_bt_dpiSamples_over = newImage("images/bt_willworkuniversity-bt_dp.gif");
		bt_dpiSamples_bt_willworkuniversity_over = newImage("images/bt_dpiSamples-bt_willworkun.gif");
		bt_dpiSamples_bt_contactus_over = newImage("images/bt_dpiSamples-bt_contactus_.gif");
		bt_dpiSamples_over = newImage("images/bt_dpiSamples-over.gif");
		bt_contactus_over = newImage("images/bt_contactus-over.gif");
		bt_contactus_bt_dpiSamples_over = newImage("images/bt_contactus-bt_dpiSamples_.gif");
		preloadFlag = true;
	}
}