var imageFiles_1s_49 = new Array();
imageFiles_1s_49['0'] = new Array ('_images/1s_CALENDAR.gif', '_images/1s_CALENDARMouseover.gif');
imageFiles_1s_49['1'] = new Array ('_images/1s_STUDENTS.gif', '_images/1s_STUDENTSMouseover.gif');
imageFiles_1s_49['2'] = new Array ('_images/1s_STAFF.gif', '_images/1s_STAFFMouseover.gif');
imageFiles_1s_49['3'] = new Array ('_images/1s_LOGIN.gif', '_images/1s_LOGINMouseover.gif');

function image_on_1s_49 (position) {
   var doc = eval("document.image1s_49" + position);
   doc.src = imageFiles_1s_49[position][1];
}

function image_off_1s_49 (position) {
   var doc = eval("document.image1s_49" + position);
   doc.src = imageFiles_1s_49[position][0];
}