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 = "images/top_p1.jpg";
img2 = "images/top_p2.jpg";
img3 = "images/top_p3.jpg";	
img4 = "images/top_p4.jpg";	
img5 = "images/top_p5.jpg";	
img6 = "images/top_p6.jpg";	
img7 = "images/top_p7.jpg";	
img8 = "images/top_p8.jpg";	
function display_image(){
	iValue = Math.random() * 8;
	rNumber = Math.ceil(iValue);
	if(rNumber==0) rNumber++;
	document.image1.src=eval("img" + rNumber);
}