// top navigation rollover script
function registerImage(imgName) {
	eval(imgName + "over = new Image()");
	eval(imgName + "over.src = \"/images/nav/" + imgName + "_over.gif\"");
	eval(imgName + " = new Image()");
	eval(imgName + ".src = \"/images/nav/" + imgName + ".gif\"");
}

function on(imgID) {
	img = document.getElementById(imgID);
	img.src = eval(imgID + "over.src");
}

function off(imgID) {
	img = document.getElementById(imgID);
	img.src = eval(imgID + ".src");
}

//register top navigation rollovers
registerImage("welcome");
registerImage("idas");
registerImage("cgh");
registerImage("tracks");
registerImage("descriptions");
registerImage("sponsors");
registerImage("partners");
registerImage("hotel");
registerImage("contact");
registerImage("brochure");
registerImage("stipends");
registerImage("sao");
registerImage("press");
registerImage("register");
registerImage("staff");
registerImage("policy");
registerImage("participants");
registerImage("conference");
registerImage("research_bulletin");
registerImage("survey");

// cetered pop-up script
function thePopper(url,ht,wd) {
var winl = (screen.width - wd)/2;
var wint = (screen.height - ht)/2;
exampleWin = window.open( url, "exwin", "status=0,toolbars=0,scrollbars=1,resizable=1,menubar=0,width="+wd+",height="+ht+",left="+winl+",top="+wint+"");
if(parseInt(navigator.appVersion) >= 4){exampleWin.window.focus();}
}