var imageFiles_4z_55 = new Array();
imageFiles_4z_55['0'] = new Array ('_images/4z_HOME.gif', '_images/4z_HOMEMouseover.gif');

function image_on_4z_55 (position) {
   var doc = eval("document.image4z_55" + position);
   doc.src = imageFiles_4z_55[position][1];
}

function image_off_4z_55 (position) {
   var doc = eval("document.image4z_55" + position);
   doc.src = imageFiles_4z_55[position][0];
}