var imageFiles_u7_1 = new Array();
imageFiles_u7_1['0'] = new Array ('_images/u7_Model_DX.gif', '_images/u7_Model_DXMouseover.gif');

function image_on_u7_1 (position) {
   var doc = eval("document.imageu7_1" + position);
   doc.src = imageFiles_u7_1[position][1];
}

function image_off_u7_1 (position) {
   var doc = eval("document.imageu7_1" + position);
   doc.src = imageFiles_u7_1[position][0];
}