var imageFiles_4t9up_23 = new Array();
imageFiles_4t9up_23['0'] = new Array ('_images/4t9up_Home.gif', '_images/4t9up_HomeMouseover.gif');
imageFiles_4t9up_23['1'] = new Array ('_images/4t9up_About_Us.gif', '_images/4t9up_About_UsMouseover.gif');
imageFiles_4t9up_23['2'] = new Array ('_images/4t9up_Projects.gif', '_images/4t9up_ProjectsMouseover.gif');
imageFiles_4t9up_23['3'] = new Array ('_images/4t9up_Contact_Us.gif', '_images/4t9up_Contact_UsMouseover.gif');

function image_on_4t9up_23 (position) {
   var doc = eval("document.image4t9up_23" + position);
   doc.src = imageFiles_4t9up_23[position][1];
}

function image_off_4t9up_23 (position) {
   var doc = eval("document.image4t9up_23" + position);
   doc.src = imageFiles_4t9up_23[position][0];
}