var imageFiles_tt_22 = new Array();
imageFiles_tt_22['0'] = new Array ('_images/tt_Home.gif', '_images/tt_HomeMouseover.gif');
imageFiles_tt_22['1'] = new Array ('_images/tt_About_RMS.gif', '_images/tt_About_RMSMouseover.gif');

function image_on_tt_22 (position) {
   var doc = eval("document.imagett_22" + position);
   doc.src = imageFiles_tt_22[position][1];
}

function image_off_tt_22 (position) {
   var doc = eval("document.imagett_22" + position);
   doc.src = imageFiles_tt_22[position][0];
}