var ar = new Array("28","29","35","36","37","38","40","42","43","44","45","48","65","66","69","70","72","73");
var num = Math.floor(Math.random() * ar.length);
document.write('<img src="pix/subPix' + ar[num] + 'b.jpg" width="234" height="293" alt="Image of dancers">');