if (document.images) 
{
  	var img1 = new Image();
  	var img2 = new Image();
	var img3 = new Image();
	var img4 = new Image();
  	img1.src = "images/nav/gamesRoll.jpg";
  	img2.src = "images/nav/blogRoll.jpg";
	img3.src = "images/nav/contactRoll.jpg";
	img4.src = "images/nav/casualRoll.jpg";
}

function toggleMenu(objID) {
	if (!document.getElementById) return;
	var ob = document.getElementById(objID).style;
	ob.display = (ob.display == 'block')?'none': 'block';
}