var ads = [];
ads.push(['<a href="http://www.vancl.com/WebSource/WebSource.aspx?source=myloter&url=http://www.vancl.com/" target="_blank"><img src="http://union.vancl.com/adpic.aspx?w=120&h=600" border="0" /></a>', 0, 0]);
var index = Math.floor(Math.random()*ads.length);
var today = new Date();
var i = 0;
while(((ads[index][1] > 0 && ads[index][1] * 1000 > today) 
|| ((ads[index][2] > 0 && ads[index][2] * 1000 < today))) 
&& i < 30) {
index = Math.floor(Math.random()*ads.length);
i++;
}
document.write(ads[index][0]);