// JavaScript Document

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) {
		b_home_over = newImage("images/b_home-over.gif");
		b_program_over = newImage("images/b_program-over.gif");
		b_panels_over = newImage("images/b_panels-over.gif");
		b_register_over = newImage("images/b_register-over.gif");
		b_support_over = newImage("images/b_support-over.gif");
		b_venue_over = newImage("images/b_venue-over.gif");
		b_travel_over = newImage("images/b_travel-over.gif");
		b_media_over = newImage("images/b_media-over.gif");
		preloadFlag = true;
	}
}