var iValue, rNumber;
var img1 = new Image();
var img2 = new Image();
var img3 = new Image();
var img4 = new Image();
var img5 = new Image();
var img6 = new Image();
var img7 = new Image();
var img8 = new Image();
img1 = "image/topimage/topimg01.jpg";
img2 = "image/topimage/topimg02.jpg";
img3 = "image/topimage/topimg03.jpg";
img4 = "image/topimage/topimg04.jpg";
img5 = "image/topimage/topimg05.jpg";
img6 = "image/topimage/topimg06.jpg";
img7 = "image/topimage/topimg07.jpg";
img8 = "image/topimage/topimg08.jpg";
function display_image(){
	iValue = Math.random() * 8;
	rNumber = Math.ceil(iValue);
	if(rNumber==0) rNumber++;
	document.image1.src=eval("img" + rNumber);
}