var imageFiles_b2_7 = new Array();
imageFiles_b2_7['0'] = new Array ('_images/b2_Home.gif', '_images/b2_HomeMouseover.gif');
imageFiles_b2_7['1'] = new Array ('_images/b2_2010_Challenge.gif', '_images/b2_2010_ChallengeMouseover.gif');
imageFiles_b2_7['2'] = new Array ('_images/b2_Calendar_of_Events.gif', '_images/b2_Calendar_of_EventsMouseover.gif');

function image_on_b2_7 (position) {
   var doc = eval("document.imageb2_7" + position);
   doc.src = imageFiles_b2_7[position][1];
}

function image_off_b2_7 (position) {
   var doc = eval("document.imageb2_7" + position);
   doc.src = imageFiles_b2_7[position][0];
}