var imageFiles_f4_1 = new Array();
imageFiles_f4_1['0'] = new Array ('_images/f4_HOME_______.gif', '_images/f4_HOME_______Mouseover.gif');
imageFiles_f4_1['1'] = new Array ('_images/f4____MENU____.gif', '_images/f4____MENU____Mouseover.gif');

function image_on_f4_1 (position) {
   var doc = eval("document.imagef4_1" + position);
   doc.src = imageFiles_f4_1[position][1];
}

function image_off_f4_1 (position) {
   var doc = eval("document.imagef4_1" + position);
   doc.src = imageFiles_f4_1[position][0];
}