if (document.images) {
    bookingbuttonup       = new Image();
    bookingbuttonup.src   = "images/siteImg/boardRoomBookingOff.gif" ;
    bookingbuttondown     = new Image() ;
    bookingbuttondown.src = "images/siteImg/boardRoomBookingOn.gif" ;

    communitybuttonup       = new Image();
    communitybuttonup.src   = "images/siteImg/communityOff.gif" ;
    communitybuttondown     = new Image() ;
    communitybuttondown.src = "images/siteImg/communityOn.gif" ;
    
    newclientbuttonup       = new Image();
    newclientbuttonup.src   = "images/siteImg/newClientOff.gif" ;
    newclientbuttondown     = new Image() ;
    newclientbuttondown.src = "images/siteImg/newClientOn.gif" ;

}
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" );
    }
}