var imageFiles_12_15 = new Array();
imageFiles_12_15['0'] = new Array ('_images/12_Home.gif', '_images/12_HomeMouseover.gif');
imageFiles_12_15['1'] = new Array ('_images/12_Menu.gif', '_images/12_MenuMouseover.gif');
imageFiles_12_15['2'] = new Array ('_images/12_Articles.gif', '_images/12_ArticlesMouseover.gif');
imageFiles_12_15['3'] = new Array ('_images/12_Map.gif', '_images/12_MapMouseover.gif');
imageFiles_12_15['4'] = new Array ('_images/12_Hot_Links.gif', '_images/12_Hot_LinksMouseover.gif');

function image_on_12_15 (position) {
   var doc = eval("document.image12_15" + position);
   doc.src = imageFiles_12_15[position][1];
}

function image_off_12_15 (position) {
   var doc = eval("document.image12_15" + position);
   doc.src = imageFiles_12_15[position][0];
}