// Preload images 
if (document.images) {
    
	home_on = new Image(); home_on.src = "images/home_on.gif";
	aboutus_on = new Image(); aboutus_on.src = "images/aboutus_on.gif";
	boingo_on = new Image(); boingo_on.src = "images/boingo_on.gif";
	photos_on = new Image(); photos_on.src = "images/photos_on.gif";
	showdates_on = new Image(); showdates_on.src = "images/showdates_on.gif";
	party_on = new Image(); party_on.src = "images/party_on.gif";
	contact_on = new Image(); contact_on.src = "images/contact_on.gif";
	
	home_off = new Image(); home_off.src = "images/home_off.gif";
	aboutus_off = new Image(); aboutus_off.src = "images/aboutus_off.gif";
	boingo_off = new Image(); boingo_off.src = "images/boingo_off.gif";
	photos_off = new Image(); photos_off.src = "images/photos_off.gif";
	showdates_off = new Image(); showdates_off.src = "images/showdates_off.gif";
	party_off = new Image(); party_off.src = "images/party_off.gif";
	contact_off = new Image(); contact_off.src = "images/contact_off.gif";
	
	
        }
function imgOn(imgName) {
        if (document.images) {
                document[imgName].src = eval(imgName + "_on.src");
                }
}
function imgOff(imgName) {
        if (document.images) {
                document[imgName].src = eval(imgName + "_off.src");
                }
}