var advert_array = new Array();
advert_array[0] = "<a href='http://www.ukeas.com.tw/advert/advert_page.php?ad_id=84'><img src='http://www.ukeas.com.tw/advert/images/ukeas_work.gif' border='0'></a>"
function show_banner(){ 
var number = Math.floor(1*Math.random()); 
document.getElementById("BANNER").innerHTML = advert_array[number];}