image1 = new Image();
image1.src = "../image/normal_button.gif";

image2 = new Image();
image2.src = "../image/over_button.gif";

image3 = new Image();
image3.src = "../image/normal_button.gif";

image4 = new Image();
image4.src = "../image/over_button.gif";

image5 = new Image();
image5.src = "../image/normal_button.gif";

image6 = new Image();
image6.src = "../image/over_button.gif";

image7 = new Image();
image7.src = "../image/over_button.gif";

image8 = new Image();
image8.src = "../image/over_button.gif";

image9 = new Image();
image9.src = "../image/over_button.gif";

image10 = new Image();
image10.src = "../image/over_button.gif";

image11 = new Image();
image11.src = "../image/over_button.gif";