// JavaScript Rollovers
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_overview_over = newImage("images/home_overview-over.gif");
		home_highlights_over = newImage("images/home_highlights-over.gif");
		home_agendas_over = newImage("images/home_agendas-over.gif");
		home_registration_over = newImage("images/home_registration-over.gif");
		home_travel_over = newImage("images/home_travel-over.gif");
		home_sponsors_over = newImage("images/home_sponsors-over.gif");
		home_attendees_over = newImage("images/home_attendees-over.gif");
		home_reviews_over = newImage("images/home_reviews-over.gif");
		home_sitemap_over = newImage("images/home_sitemap-over.gif");
		home_contact_over = newImage("images/home_contact-over.gif");
		menu_home_over = newImage("images/menu_home-over.gif");
		menu_overview_over = newImage("images/menu_overview-over.gif");
		menu_highlights_over = newImage("images/menu_highlights-over.gif");
		menu_agendas_over = newImage("images/menu_agendas-over.gif");
		menu_registration_over = newImage("images/menu_registration-over.gif");
		menu_travel_over = newImage("images/menu_travel-over.gif");
		menu_sponsors_over = newImage("images/menu_sponsors-over.gif");
		menu_attendees_over = newImage("images/menu_attendees-over.gif");
		menu_reviews_over = newImage("images/menu_reviews-over.gif");
		menu_sitemap_over = newImage("images/menu_sitemap-over.gif");
		menu_contact_over = newImage("images/menu_contact-over.gif");
		nav_overview01_over = newImage("images/nav_overview01-over.gif");
		nav_overview02_over = newImage("images/nav_overview02-over.gif");
		nav_overview03_over = newImage("images/nav_overview03-over.gif");
		nav_highlights01_over = newImage("images/nav_highlights01-over.gif");
		nav_highlights02_over = newImage("images/nav_highlights02-over.gif");
		nav_highlights03_over = newImage("images/nav_highlights03-over.gif");
		nav_agendas01_over = newImage("images/nav_agendas01-over.gif");
		nav_agendas02_over = newImage("images/nav_agendas02-over.gif");
		nav_agendas03_over = newImage("images/nav_agendas03-over.gif");
		nav_agendas04_over = newImage("images/nav_agendas04-over.gif");
		nav_registration01_over = newImage("images/nav_registration01-over.gif");
		nav_registration02_over = newImage("images/nav_registration02-over.gif");
		nav_registration03_over = newImage("images/nav_registration03-over.gif");
		nav_registernow_over = newImage("images/nav_registerno-over.gif");
		nav_travel01_over = newImage("images/nav_travel01-over.gif");
		nav_travel02_over = newImage("images/nav_travel02-over.gif");
		nav_travel03_over = newImage("images/nav_travel03-over.gif");
		nav_travel04_over = newImage("images/nav_travel04-over.gif");
		nav_review01_over = newImage("images/nav_review01-over.gif");
		nav_review02_over = newImage("images/nav_review02-over.gif");
		nav_review03_over = newImage("images/nav_review03-over.gif");
		nav_review04_over = newImage("images/nav_review04-over.gif");
		nav_attendees00_over = newImage("images/nav_attendees00-over.gif");
		nav_attendees01_over = newImage("images/nav_attendees01-over.gif");
		nav_attendees02_over = newImage("images/nav_attendees02-over.gif");
		nav_attendees03_over = newImage("images/nav_attendees03-over.gif");
		nav_attendees04_over = newImage("images/nav_attendees04-over.gif");
		preloadFlag = true;
	}
}

// Drop Down Menus
var inmenu=false;
var lastmenu=0;
function Menu(current) {
   if (!document.getElementById) return;
   inmenu=true;
   oldmenu=lastmenu;
   lastmenu=current;
   if (oldmenu) Erase(oldmenu);
   m=document.getElementById("menu-" + current);
   box=document.getElementById(current);
   box.style.visibility="visible";
}
function Erase(current) {
   if (!document.getElementById) return;
   if (inmenu && lastmenu==current) {
     return;
   }
   m=document.getElementById("menu-" + current);
   box=document.getElementById(current);
   box.style.visibility="hidden";
}
function Timeout(current) {
   inmenu=false;
   window.setTimeout("Erase('" + current + "');",500) ;
}
function Highlight(menu,item) {
   if (!document.getElementById) return;
   inmenu=true;
   lastmenu=menu;
   obj=document.getElementById(item);
   obj.style.backgroundColor="#000000;";
}
function UnHighlight(menu,item) {
   if (!document.getElementById) return;
   Timeout(menu);
   obj=document.getElementById(item);
   obj.style.backgroundColor="#000000;";
}