js code to change a immage
<script type="text/javascript"> function changeImage(a) { document.getElementById("img").src=a.src; } </script> <div id="main_img"> <img id="img" src="1772031_29_b.jpg"> </div> <div id="thumb_img"> <img src='1772031_29_t.jpg' onclick='changeImage("1772031_29_b.jpg");'> <img src='1772031_55_t.jpg' onclick='changeImage("1772031_55_b.jpg");'> <img src='1772031_53_t.jpg' onclick='changeImage("1772031_53_b.jpg");'> </div>