var imageFiles_b_4 = new Array();
imageFiles_b_4['0'] = new Array ('_images/b_A_to_Z.gif', '_images/b_A_to_ZMouseover.gif');
imageFiles_b_4['1'] = new Array ('_images/b_Test_Quizzers.gif', '_images/b_Test_QuizzersMouseover.gif');
imageFiles_b_4['2'] = new Array ('_images/b_Training_Bundles.gif', '_images/b_Training_BundlesMouseover.gif');
imageFiles_b_4['3'] = new Array ('_images/b_Our_Clients.gif', '_images/b_Our_ClientsMouseover.gif');

function image_on_b_4 (position) {
   var doc = eval("document.imageb_4" + position);
   doc.src = imageFiles_b_4[position][1];
}

function image_off_b_4 (position) {
   var doc = eval("document.imageb_4" + position);
   doc.src = imageFiles_b_4[position][0];
}