var imageFiles_z6_13 = new Array();
imageFiles_z6_13['0'] = new Array ('_images/z6_Home.gif', '_images/z6_HomeMouseover.gif');
imageFiles_z6_13['1'] = new Array ('_images/z6_Calendar_of_Events.gif', '_images/z6_Calendar_of_EventsMouseover.gif');
imageFiles_z6_13['2'] = new Array ('_images/z6_2010_Challenge.gif', '_images/z6_2010_ChallengeMouseover.gif');

function image_on_z6_13 (position) {
   var doc = eval("document.imagez6_13" + position);
   doc.src = imageFiles_z6_13[position][1];
}

function image_off_z6_13 (position) {
   var doc = eval("document.imagez6_13" + position);
   doc.src = imageFiles_z6_13[position][0];
}