img = new Array();
img[0] = "http://www.juken-net.com/images/nabi21.gif";
img[1] = "http://www.juken-net.com/images/nabi22.gif";


function setBanner(){
	amount = img.length;
	No = Math.floor(Math.random()*amount);
	document.write("<img src='" + img[No] + "' border='0' usemap='#Map2' >");
}