if (document.images)
{
aboutus_on = new Image();
aboutus_on.src = "nav/topnav2_aboutus_on.gif";
aboutus_off = new Image();
aboutus_off.src = "nav/topnav2_aboutus_off.gif";

references_on = new Image();
references_on.src = "nav/topnav2_references_on.gif";
references_off = new Image();
references_off.src = "nav/topnav2_references_off.gif";

contact_on = new Image();
contact_on.src = "nav/topnav2_contact_on.gif";
contact_off = new Image();
contact_off.src = "nav/topnav2_contact_off.gif";

design_on = new Image();
design_on.src = "nav/nav2_design_on.gif";
design_off = new Image();
design_off.src = "nav/nav2_design.gif";

print_on = new Image();
print_on.src = "nav/nav2_print_on.gif";
print_off = new Image();
print_off.src = "nav/nav2_print.gif";

web_on = new Image();
web_on.src = "nav/nav2_web_on.gif";
web_off = new Image();
web_off.src = "nav/nav2_web.gif";

flash_on = new Image();
flash_on.src = "nav/nav2_flash_on.gif";
flash_off = new Image();
flash_off.src = "nav/nav2_flash.gif";

video_on = new Image();
video_on.src = "nav/nav2_video_on.gif";
video_off = new Image();
video_off.src = "nav/nav2_video.gif";

photo_on = new Image();
photo_on.src = "nav/nav2_photo_on.gif";
photo_off = new Image();
photo_off.src = "nav/nav2_photo.gif";

back_on = new Image();
back_on.src = "nav/button_back_on.jpg";
back_off = new Image();
back_off.src = "nav/button_back_off.jpg";

next_on = new Image();
next_on.src = "nav/button_next_on.jpg";
next_off = new Image();
next_off.src = "nav/button_next_off.gif";

jm_on = new Image();
jm_on.src = "images/logo_jm_on.jpg";
jm_off = new Image();
jm_off.src = "images/logo_jm_off.jpg";

m2factory_on = new Image();
m2factory_on.src = "images/logo_m2factory_on.jpg";
m2factory_off = new Image();
m2factory_off.src = "images/logo_m2factory_off.jpg";

hm_on = new Image();
hm_on.src = "images/logo_hm_on.jpg";
hm_off = new Image();
hm_off.src = "images/logo_hm_off.jpg";

}

 function rollOn(imgName)
 {
   if (document.images) {
    imgOn = eval(imgName + "_on.src");
    document [imgName].src = imgOn;
   }
 }

 function rollOff(imgName)
 {
   if (document.images) {
    imgOff = eval(imgName + "_off.src");
    document [imgName].src = imgOff;
   }
 }