var imagesAllLoaded = false;
var imagePrefix = "nav";
var numOfImages = 6;

function LI() 
{
	if (document.images) 
	{
		for (var i = 1; i <= numOfImages; i++) 
		{
			eval (imagePrefix + i + '_0 = new Image();');
			eval (imagePrefix + i + '_0.src = "images/' + imagePrefix + i + '_0.gif";');
			eval (imagePrefix + i + '_1 = new Image();');
			eval (imagePrefix + i + '_1.src = "images/' + imagePrefix + i + '_1.gif";');
		}
		
		imagesAllLoaded = true;
	}
}

function SI(id, hilite) 
{
	if (imagesAllLoaded && (document[imagePrefix + id])) 
		document[imagePrefix + id].src = eval(imagePrefix + id + "_" + hilite + ".src");
}