image_0aon = new Image(52, 340);
image_0aon.src = "images/ctbg.gif"; 
image_1aon = new Image(52, 340);
image_1aon.src = "images/mainbanner4.gif"; 
image_2aon = new Image(52, 340);
image_2aon.src = "images/navbg.gif"; 
image_3aon = new Image(52, 340);
image_3aon.src = "images/navbg3.gif";