// JavaScript Document
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();
var img9 = new Image();
var img10 = new Image();

img1 = "http://www.suppose.jp/top_img/topimage01.jpg";
img2 = "http://www.suppose.jp/top_img/topimage02.jpg";
img3 = "http://www.suppose.jp/top_img/topimage03.jpg";
img4 = "http://www.suppose.jp/top_img/topimage04.jpg";
img5 = "http://www.suppose.jp/top_img/topimage05.jpg";
img6 = "http://www.suppose.jp/top_img/topimage06.jpg";
img7 = "http://www.suppose.jp/top_img/topimage07.jpg";
img8 = "http://www.suppose.jp/top_img/topimage08.jpg";
img9 = "http://www.suppose.jp/top_img/topimage09.jpg";
img10 = "http://www.suppose.jp/top_img/topimage10.jpg";

function display_image(){
	iValue = Math.random() * 10;
	rNumber = Math.ceil(iValue);
	if(rNumber==0) rNumber++;
	document.image1.src=eval("img" + rNumber);
	
	var objid=document.getElementById('mainimage');
	objid.style.display = "block";
}