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) {
		home_over = newImage("images/home-over.gif");
		aboutus_over = newImage("images/aboutus-over.gif");
		contactus_over = newImage("images/contactus-over.gif");
		whereweare_over = newImage("images/whereweare-over.gif");
		buying_over = newImage("images/buying-over.gif");
		selling_over = newImage("images/selling-over.gif");
		mortgages_over = newImage("images/mortgages-over.gif");
		landlords_over = newImage("images/landlords-over.gif");
		registration_over = newImage("images/registration-over.gif");
		preloadFlag = true;
	}
}