var photos = new Array();

photos[0] = "sidepic1.jpg";
photos[1] = "sidepic2.jpg";
photos[2] = "sidepic3.jpg";
photos[3] = "sidepic4.jpg";
photos[4] = "sidepic5.jpg";
photos[5] = "sidepic6.jpg";
photos[6] = "sidepic7.jpg";
photos[7] = "sidepic8.jpg";
photos[8] = "sidepic9.jpg";
photos[9] = "sidepic10.jpg";

var whichSet = Math.round(Math.random()*(photos.length-1));