image1 = new Image();
image1.src = "images/btn1_over.gif";

image2 = new Image();
image2.src = "images/btn2_over.gif";

image3 = new Image();
image3.src = "images/btn3_over.gif";

image4 = new Image();
image4.src = "images/btn4_over.gif";




// End -->