images = new Array(8);
images[0] = "<img src='http://www.sportandspinerehab.ca/images/back_lg.jpg' alt='Sport and Spine'>";
images[1] = "<img src='http://www.sportandspinerehab.ca/images/001ice-hockey.jpg' alt='Sport and Spine'>";
images[2] = "<img src='http://www.sportandspinerehab.ca/images/001soccer-players.jpg' alt='Sport and Spine'>";
images[3] = "<img src='http://www.sportandspinerehab.ca/images/bryan-david-george-kelly-greg.jpg' alt='Sport and Spine'>";
images[4] = "<img src='http://www.sportandspinerehab.ca/images/001strolling-in-the-park.jpg' alt='Sport and Spine'>";
images[5] = "<img src='http://www.sportandspinerehab.ca/images/001woman-is-ascending-the-mountain-via-ferrata.jpg' alt='Sport and Spine'>";
images[6] = "<img src='http://www.sportandspinerehab.ca/images/physio_bed.jpg' alt='Sport and Spine'>";
images[7] = "<img src='http://www.sportandspinerehab.ca/images/physio_lg.jpg' alt='Sport and Spine'>";

index = Math.floor(Math.random() * images.length);
document.write(images[index]);