var mess = new Array('<a href=catalog><img src=template/img/featured1.jpg class=main_img></a>','<a href=catalog><img src=template/img/featured2.jpg class=main_img></a>','<a href=catalog><img src=template/img/featured3.jpg class=main_img></a>','<a href=catalog><img src=template/img/featured4.jpg class=main_img></a>','<a href=catalog><img src=template/img/featured5.jpg class=main_img></a>');
var max = mess.length;
var num = Math.floor((Math.random() * max));
document.writeln(mess[num]);