if (document.images) {
    homebuttonup       = new Image();
    homebuttonup.src   = "images/nav_home.jpg" ;
    homebuttondown     = new Image() ;
    homebuttondown.src = "images/nav_home_hover.jpg" ;
    
    eventsbuttonup       = new Image();
    eventsbuttonup.src   = "images/nav_events.jpg" ;
    eventsbuttondown     = new Image() ;
    eventsbuttondown.src = "images/nav_events_hover.jpg" ;
    
    vipbuttonup       = new Image();
    vipbuttonup.src   = "images/nav_vip.jpg" ;
    vipbuttondown     = new Image() ;
    vipbuttondown.src = "images/nav_vip_hover.jpg" ;
    
    stagsbuttonup       = new Image();
    stagsbuttonup.src   = "images/nav_stags.jpg" ;
    stagsbuttondown     = new Image() ;
    stagsbuttondown.src = "images/nav_stags_hover.jpg" ;
    
    kitchenbuttonup       = new Image();
    kitchenbuttonup.src   = "images/nav_kitchen.jpg" ;
    kitchenbuttondown     = new Image() ;
    kitchenbuttondown.src = "images/nav_kitchen_hover.jpg" ;

    gallerybuttonup       = new Image();
    gallerybuttonup.src   = "images/nav_gallery.jpg" ;
    gallerybuttondown     = new Image() ;
    gallerybuttondown.src = "images/nav_gallery_hover.jpg" ;       
    
    contactbuttonup       = new Image();
    contactbuttonup.src   = "images/nav_contact.jpg" ;
    contactbuttondown     = new Image() ;
    contactbuttondown.src = "images/nav_contact_hover.jpg" ;       
    
    hiringbuttonup       = new Image();
    hiringbuttonup.src   = "images/nav_hiring.jpg" ;
    hiringbuttondown     = new Image() ;
    hiringbuttondown.src = "images/nav_hiring_hover.jpg" ;      
    
}
function buttondown( buttonname )
{
    if (document.images) {
      document[ buttonname ].src = eval( buttonname + "down.src" );
    }
}
function buttonup ( buttonname )
{
    if (document.images) {
      document[ buttonname ].src = eval( buttonname + "up.src" );
    }
}