var ar = new Array("19","20","22","27","32","37","39","44","45","46","47","49","51","52","54","56","57","61","62","67");
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">');