var imageFiles_4r_304 = new Array();
imageFiles_4r_304['0'] = new Array ('_images/4r_Janitrol.gif', '_images/4r_JanitrolMouseover.gif');

function image_on_4r_304 (position) {
   var doc = eval("document.image4r_304" + position);
   doc.src = imageFiles_4r_304[position][1];
}

function image_off_4r_304 (position) {
   var doc = eval("document.image4r_304" + position);
   doc.src = imageFiles_4r_304[position][0];
}