home     = new Image();
    home.src   = "images/home.jpg" ;
    home_over     = new Image() ;
    home_over.src = "images/home_over.jpg" ;

    about     = new Image();
    about.src   = "images/about.jpg" ;
    about_over     = new Image() ;
    about_over.src = "images/about_over.jpg" ;

    search     = new Image();
    search.src   = "images/search.jpg" ;
    search_over     = new Image() ;
    search_over.src = "images/search_over.jpg" ;

    contact     = new Image();
    contact.src   = "images/contact.jpg" ;
    contact_over     = new Image() ;
    contact_over.src = "images/contact_over.jpg" ;

    button5     = new Image();
    button5.src   = "images/button5.jpg" ;
    button5_down     = new Image() ;
    button5_down.src = "images/button5_down.jpg" ;

    areadetails     = new Image();
    areadetails.src   = "images/areadetails.jpg" ;
    areadetails_over     = new Image() ;
    areadetails_over.src = "images/areadetails_over.jpg" ;

    detailed     = new Image();
    detailed.src   = "images/detailed.jpg" ;
    detailed_over     = new Image() ;
    detailed_over.src = "images/detailed_over.jpg" ;

function buttondown( buttonname )
{
    if (document.images) {
      document[ buttonname ].src = eval( buttonname + "_over.src" );
    }
}
function buttonup ( buttonname )
{
    if (document.images) {
      document[ buttonname ].src = eval( buttonname + ".src" );
    }
}