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(imageset) {
	if (document.images) {
	switch(imageset) {
		case("main"):
		contactus_over = newImage("/images/nav/contactus_over.gif");
		work_over = newImage("/images/nav/work_over.gif");
		aboutus_over = newImage("/images/nav/aboutus_over.gif");
		home_over = newImage("/images/nav/home_over.gif");
		break;
		
		case("test"):
		comming_over = newImage("/images/nav/aboutus/comming_over.gif");
		sports_over = newImage("/images/nav/aboutus/sports_over.gif");
		officers_over = newImage("/images/nav/aboutus/officers_over.gif");
		logos_over = newImage("/images/nav/aboutus/logos_over.gif");
		break;
		
		

		}
		preloadFlag = true;
	}
}