var imageFiles_1y_21 = new Array();
imageFiles_1y_21['0'] = new Array ('_images/1y_Home.gif', '_images/1y_HomeMouseover.gif');
imageFiles_1y_21['1'] = new Array ('_images/1y_Schedule.gif', '_images/1y_ScheduleMouseover.gif');
imageFiles_1y_21['2'] = new Array ('_images/1y_Calendar.gif', '_images/1y_CalendarMouseover.gif');
imageFiles_1y_21['3'] = new Array ('_images/1y_MAPs.gif', '_images/1y_MAPsMouseover.gif');
imageFiles_1y_21['4'] = new Array ('_images/1y_Math_Links.gif', '_images/1y_Math_LinksMouseover.gif');
imageFiles_1y_21['5'] = new Array ('_images/1y_Science_Links.gif', '_images/1y_Science_LinksMouseover.gif');
imageFiles_1y_21['6'] = new Array ('_images/1y_Books.gif', '_images/1y_BooksMouseover.gif');
imageFiles_1y_21['7'] = new Array ('_images/1y_Pi.gif', '_images/1y_PiMouseover.gif');
imageFiles_1y_21['8'] = new Array ('_images/1y_Summer_Camps.gif', '_images/1y_Summer_CampsMouseover.gif');

function image_on_1y_21 (position) {
   var doc = eval("document.image1y_21" + position);
   doc.src = imageFiles_1y_21[position][1];
}

function image_off_1y_21 (position) {
   var doc = eval("document.image1y_21" + position);
   doc.src = imageFiles_1y_21[position][0];
}