var imageFiles_tl_4 = new Array();
imageFiles_tl_4['0'] = new Array ('_images/tl_Crystal.gif', '_images/tl_CrystalMouseover.gif');

function image_on_tl_4 (position) {
   var doc = eval("document.imagetl_4" + position);
   doc.src = imageFiles_tl_4[position][1];
}

function image_off_tl_4 (position) {
   var doc = eval("document.imagetl_4" + position);
   doc.src = imageFiles_tl_4[position][0];
}