var imageFiles_3r_73 = new Array();
imageFiles_3r_73['0'] = new Array ('_images/3r_Home.gif', '_images/3r_HomeMouseover.gif');
imageFiles_3r_73['1'] = new Array ('_images/3r_About_the_Book.gif', '_images/3r_About_the_BookMouseover.gif');
imageFiles_3r_73['2'] = new Array ('_images/3r_About_the_Authors.gif', '_images/3r_About_the_AuthorsMouseover.gif');
imageFiles_3r_73['3'] = new Array ('_images/3r_Order_Online.gif', '_images/3r_Order_OnlineMouseover.gif');
imageFiles_3r_73['4'] = new Array ('_images/3r_Contact_Us.gif', '_images/3r_Contact_UsMouseover.gif');

function image_on_3r_73 (position) {
   var doc = eval("document.image3r_73" + position);
   doc.src = imageFiles_3r_73[position][1];
}

function image_off_3r_73 (position) {
   var doc = eval("document.image3r_73" + position);
   doc.src = imageFiles_3r_73[position][0];
}