if (document.images) {
    home       = new Image();
    home.src   = "navigation/home.jpg" ;
    homeover     = new Image() ;
    homeover.src = "navigation/homeover.jpg" ;

    products       = new Image();
    products.src   = "navigation/products.jpg" ;
    productsover     = new Image() ;
    productsover.src = "navigation/productsover.jpg" ;

    training       = new Image();
    training.src   = "navigation/training.jpg" ;
    trainingover     = new Image() ;
    trainingover.src = "navigation/trainingover.jpg" ;

    affiliates       = new Image();
    affiliates.src   = "navigation/affiliates.jpg" ;
    affiliatesover     = new Image() ;
    affiliatesover.src = "navigation/affiliatesover.jpg" ;

    contactus       = new Image();
    contactus.src   = "navigation/contactus.jpg" ;
    contactusover     = new Image() ;
    contactusover.src = "navigation/contactusover.jpg" ;

    onlinestore       = new Image();
    onlinestore.src   = "navigation/onlinestore.jpg" ;
    onlinestoreover     = new Image() ;
    onlinestoreover.src = "navigation/onlinestoreover.jpg" ;

    radonepa       = new Image();
    radonepa.src   = "navigation/radonepa.jpg" ;
    radonepaover     = new Image() ;
    radonepaover.src = "navigation/radonepaover.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" );
    }
}