var myarray=new Array;
myarray[0]='<a href=\"http://www.gidgetworldwide.com/" target=\"_blank\" class=\"blk\"><img src=\"http://www.triplecrownofsurfing.com/images/banners/gidget-300.jpg" ALT= \"GIDGET" border=0></a>';
var whichbanner = Math.round(eval(myarray.length-1)*Math.random());
document.write(myarray[whichbanner] + '<BR>');