if (document.images) {
    
    cataloguein     = new Image
    catalogueout    = new Image
    doingin         = new Image
    doingout        = new Image
    soonin          = new Image
    soonout         = new Image
    kkin            = new Image
    kkout           = new Image
    linksin         = new Image
    linksout        = new Image
    contactin       = new Image
    contactout      = new Image
    
    cataloguein.src = 'gfx/navigation/catalogueact.gif'
    catalogueout.src = 'gfx/navigation/catalogue.gif'
    doingin.src = 'gfx/navigation/doact.gif'
    doingout.src = 'gfx/navigation/do.gif'
    soonin.src = 'gfx/navigation/soonact.gif'
    soonout.src = 'gfx/navigation/soon.gif'
    kkin.src = 'gfx/navigation/kesselsact.gif'
    kkout.src = 'gfx/navigation/kessels.gif'
    linksin.src = 'gfx/navigation/linksact.gif'
    linksout.src = 'gfx/navigation/links.gif'    
    contactin.src = 'gfx/navigation/contactact.gif'
    contactout.src = 'gfx/navigation/contact.gif'
    
    }