pic001 = new Image();
pic001.src = "gallery/001.jpg";

pic002 = new Image();
pic002.src = "gallery/002.jpg";

pic003 = new Image();
pic003.src = "gallery/003.jpg";

pic004 = new Image();
pic004.src = "gallery/004.jpg";

pic005 = new Image();
pic005.src = "gallery/005.jpg";

pic006 = new Image();
pic006.src = "gallery/006.jpg";

pic007 = new Image();
pic007.src = "gallery/007.jpg";

pic008 = new Image();
pic008.src = "gallery/008.jpg";

function showpic(item) {
   document.getElementById('bigpic').src=eval(item).src;
}