/*  MIT GREEK INTERVARSITY Nav JS
	Copyright 2007
*/

function initNav() {
	if ($('home')) { $('nav').style.background = "url(../images/nb2.gif) repeat-x top"; }
	var l = $('nav').getElementsByTagName('li');
	var m = new Array();
	for (i=0;i<l.length;i++) { if (l[i].parentNode.parentNode.id == 'nav') { m.push(l[i]); } }
	for (i=0;i<m.length;i++) {
		if ($(m[i].id.substring(1))) {
			Element.addClassName(m[i],'active');
			m[i].getElementsByTagName('ul')[0].style.display = 'block'; }
		if ($('home')) { m[i].onmouseover = setb; m[i].onmouseout = resetb; }
		else { m[i].onmouseover = setn; m[i].onmouseout = hiden; }
	}
	if ($('home')) { $('nav').onmouseout = hideb; }
	else { $('nav').onmouseout = hiden; }
}

function setb() { $('nav').style.background = "url(../images/nb2.gif) repeat-x bottom"; }
function resetb() { $('nav').style.background = "url(../images/nb2.gif) repeat-x top"; }

function setn() {
	var l = $('nav').getElementsByTagName('li');
	var m = new Array();
	for (i=0;i<l.length;i++) { if (l[i].parentNode.parentNode.id == 'nav') { m.push(l[i]); } }
	for (i=0;i<m.length;i++) {
		if ($(m[i].id.substring(1)) && m[i].id != this.id) {
			Element.removeClassName(m[i],'active');
			m[i].getElementsByTagName('ul')[0].style.display = 'none';
	} }
}
function hiden() {
	var l = $('nav').getElementsByTagName('li');
	var m = new Array();
	for (i=0;i<l.length;i++) { if (l[i].parentNode.parentNode.id == 'nav') { m.push(l[i]); } }
	for (i=0;i<m.length;i++) {
		if ($(m[i].id.substring(1))) {
			Element.addClassName(m[i],'active');
			m[i].getElementsByTagName('ul')[0].style.display = 'block';
	} }
}

Event.onReady(initNav);