var imageFiles_636_13 = new Array();
imageFiles_636_13['0'] = new Array ('_images/636_Home.gif', '_images/636_HomeMouseover.gif');
imageFiles_636_13['1'] = new Array ('_images/636_About_US.gif', '_images/636_About_USMouseover.gif');
imageFiles_636_13['2'] = new Array ('_images/636_History.gif', '_images/636_HistoryMouseover.gif');
imageFiles_636_13['3'] = new Array ('_images/636_Contact_Info.gif', '_images/636_Contact_InfoMouseover.gif');
imageFiles_636_13['4'] = new Array ('_images/636_Online_Catalog.gif', '_images/636_Online_CatalogMouseover.gif');

function image_on_636_13 (position) {
   var doc = eval("document.image636_13" + position);
   doc.src = imageFiles_636_13[position][1];
}

function image_off_636_13 (position) {
   var doc = eval("document.image636_13" + position);
   doc.src = imageFiles_636_13[position][0];
}