var ad=new Array()

ad[0]='<a href="http://www.foodandwineexpo.ca" target="_blank"><img src="http://www.tasteofthecity.ca/vendors/sidebanner-gourmetfood-wine.jpg" alt="Gourmet Food &amp; Wine Expo" width="350" height="138" border="0"> </a>';

var xy=Math.floor(Math.random()*ad.length);

document.write(ad[xy]);