var arrImages = new Array(5);
	var imgDir = "images/";
	arrImages[0] = imgDir + "topnav_signup_hi.gif";
	arrImages[1] = imgDir + "topnav_buyhoop_hi.gif";
	arrImages[2] = imgDir + "topnav_abouthooping_hi.gif";
	arrImages[3] = imgDir + "topnav_news_hi.gif";
	arrImages[4] = imgDir + "topnav_aboutloren_hi.gif";
	
	for (i=0; i < arrImages.length; i++) {
	  var preload = new Image();
	  preload.src = arrImages[i];
	}