g = 2 // a=numbers of banners
var slump = Math.random();
var talet_1 = Math.round(slump * (g-1))+1;
function create() {

this.src = ''
this.href = ''
this.alt = ''
this.under = ''
}

h = new Array()
for(var i=1; i<=g; i++) { h[i] = new create() }

h[1].src = "images/jiayong_1219.jpg"
h[1].href = "http://www.lenovo2008.com/jiayong/hancu?wodooPublishID=40002363"
h[1].alt = ""
h[2].src = "images/jiayong_1219.jpg"
h[2].href = "http://www.lenovo2008.com/jiayong/hancu?wodooPublishID=40002363"
h[2].alt = ""
<!--h[2].src = "images/ad_olympic.gif"
<!--h[2].href = "http://www.lenovo2008.com/digital/u_disk/"
<!--h[2].alt = ""-->