var imageFiles_u1_1 = new Array();
imageFiles_u1_1['0'] = new Array ('_images/u1_Model_GX.gif', '_images/u1_Model_GXMouseover.gif');

function image_on_u1_1 (position) {
   var doc = eval("document.imageu1_1" + position);
   doc.src = imageFiles_u1_1[position][1];
}

function image_off_u1_1 (position) {
   var doc = eval("document.imageu1_1" + position);
   doc.src = imageFiles_u1_1[position][0];
}