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) {
		vacation_over = newImage("side-img/vacation-over.gif");
		Maps_over = newImage("side-img/Maps-over.gif");
		Articles_over = newImage("side-img/Articles-over.gif");
		GetHere_over = newImage("side-img/Get-Here-over.gif");
		AskExpert_over = newImage("side-img/Ask-Expert-over.gif");
		Company_over = newImage("side-img/Company-over.gif");
		preloadFlag = true;
	}
}