function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImagesArray(array) {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<array.length; i+=2) {
			document[array[i]].src = array[i+1];
		}
	}
}

function changeImages() {
	changeImagesArray(changeImages.arguments);
}

function toggleImages() {
	for (var i=0; i<toggleImages.arguments.length; i+=2) {
		if (selected == toggleImages.arguments[i])      changeImagesArray(toggleImages.arguments[i+1]);
	}
}

var selected = '';
var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		conference_nav_01_over = newImage("images/conference_nav_01-over.jpg");
		conference_nav_02_over = newImage("images/conference_nav_02-over.jpg");
		conference_nav_03_over = newImage("images/conference_nav_03-over.jpg");
		conference_nav_04_over = newImage("images/conference_nav_04-over.jpg");
		conference_nav_05_over = newImage("images/conference_nav_05-over.jpg");
		conference_nav_06_over = newImage("images/conference_nav_06-over.jpg");
		conference_nav_07_over = newImage("images/conference_nav_07-over.jpg");
		conference_nav_08_over = newImage("images/conference_nav_08-over.jpg");
		preloadFlag = true;
	}
}
function dispDesc(frm,whatrow){
var item1 = whatrow+'1'
//var item2 = whatrow+'2'
if(document.getElementById(item1).style.visibility=="hidden"){
	//if(document.all(item1).style.visibility=="hidden"){
			for (jj = 1; jj < 2; jj++){
			var IdInUse=whatrow+jj
			var WhichIDToUse = document.getElementById(IdInUse)
					WhichIDToUse.style.display="";
					WhichIDToUse.style.visibility="visible";
			}		
	}else{
				for (jj = 1; jj < 2; jj++){
				var IdInUse=whatrow+jj
				var WhichIDToUse = document.getElementById(IdInUse)
					WhichIDToUse.style.display="none";
					WhichIDToUse.style.visibility="hidden";
				}
				
	}
}