// JavaScript Document

var isNav4, isNav6, isIE
var isBrand = navigator.appName
var agt = navigator.userAgent.toLowerCase()
var navVer = parseInt(navigator.appVersion)

isNav4 = (isBrand == "Netscape" && navVer < 5) ? true : false
isNav6 = (isBrand == "Netscape" && navVer >= 5) ? true : false

var topnavArray = new Array('approach','college','contact','faculty','graduate','research','studentwork','undergraduate');

var topnavImageCount = 10;
var rImg = Math.floor((Math.random()*topnavImageCount)+.5);
var rImgsrc = "/images/NUAlogo_level2_"+rImg+".jpg";

approach = new Image();
approach.src = "/new/images/topnav-approach.gif";
approachon = new Image();
approachon.src = "/new/images/topnav-approach-over.gif";

college = new Image();
college.src = "/new/images/topnav-college.gif";
collegeon = new Image();
collegeon.src = "/new/images/topnav-college-over.gif";

contact = new Image();
contact.src = "/new/images/topnav-contact.gif";
contacton = new Image();
contacton.src = "/new/images/topnav-contact-over.gif";

faculty = new Image();
faculty.src = "/new/images/topnav-faculty.gif";
facultyon = new Image();
facultyon.src = "/new/images/topnav-faculty-over.gif";

graduate = new Image();
graduate.src = "/new/images/topnav-graduate.gif";
graduateon = new Image();
graduateon.src = "/new/images/topnav-graduate-over.gif";

research = new Image();
research.src = "/new/images/topnav-research.gif";
researchon = new Image();
researchon.src = "/new/images/topnav-research-over.gif";

studentwork = new Image();
studentwork.src = "/new/images/topnav-studentwork.gif";
studentworkon = new Image();
studentworkon.src = "/new/images/topnav-studentwork-over.gif";

undergraduate = new Image();
undergraduate.src = "/new/images/topnav-undergraduate.gif";
undergraduateon = new Image();
undergraduateon.src = "/new/images/topnav-undergraduate-over.gif";


function imageon(name)   {document[name].src = eval(name + "on.src");}
function imageoff(name)  {document[name].src = eval(name + ".src");}
function on(name)  {
	imageon(name);	
}
function off(name)  { imageoff(name); }

function allOff() {
	for (x=0;x<	topnavArray.length;x++) {
		imageoff(topnavArray[x]);
	}
}

function clearText(form) {
	if (form.searchbox.value == "search") {
		form.searchbox.value = "";
	}
}

function toggleElements(element) {	
	var sArray = new Array('subnav-approach','subnav-college','subnav-contact','subnav-faculty','subnav-graduate','subnav-research');
	for (i=0;i<sArray.length;i++) {
		if (isNav6) {
			document.getElementById(sArray[i]).style.display = "none";
		}
		else {
			document.all[sArray[i]].style.display = "none";
		}
	}
	if (isNav6) {
		document.getElementById(element).style.display = "block";
	}
	else {
		document.all[element].style.display = "block";
	}
}

function showHideToggle(element,caller) {
	if (document.getElementById(element).style.display == "block") {
		document.getElementById(element).style.display = "none";
		document.getElementById(caller).style.listStyleImage = 'url(/images/list-arrow.gif)';
	}
	else {
		document.getElementById(element).style.display = "block";
		document.getElementById(caller).style.listStyleImage = 'url(/images/list-arrow-down.gif)';
	}
}

function showHide(element,eList) {
	lArray = eList.split(",");
	for (i=0;i<lArray.length;i++) {
		document.getElementById(lArray[i]).style.display = "none";
	}
	document.getElementById(element).style.display = "block";
}