image1 = new Image();
image1.src = "images/topnav/freecontent-over.gif";
image2 = new Image();
image2.src = "images/topnav/allcontent-over.gif";
image3 = new Image();
image3.src = "images/topnav/CME-over.gif";
image4 = new Image();
image4.src = "images/topnav/calendar-over.gif";
image5 = new Image();
image5.src = "images/topnav/home-over.gif";