image1 = new Image();
image1.src = "images/nav_overviewON.gif";
image2 = new Image();
image2.src = "images/nav_newregON.gif";
image3 = new Image();
image3.src = "images/nav_mgrinfoON.gif";
image4 = new Image();
image4.src = "images/nav_loginON.gif";
image7 = new Image();
image7.src = "images/nav_hmpgON.gif";