var imageFiles_l4_1 = new Array();
imageFiles_l4_1['0'] = new Array ('_images/l4_Home.gif', '_images/l4_HomeMouseover.gif');

function image_on_l4_1 (position) {
   var doc = eval("document.imagel4_1" + position);
   doc.src = imageFiles_l4_1[position][1];
}

function image_off_l4_1 (position) {
   var doc = eval("document.imagel4_1" + position);
   doc.src = imageFiles_l4_1[position][0];
}