var ads = new Array();
ads[0] = ['<div class="gg">\n'+
'<img height="200" width="260" alt=网上学日语" src="http://www.riyu365.com/shared/upload/pic/ad_channel260_200.gif"/>\n'+
'</div>',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]);