<!--
if (document.images) {
    aboutusbuttonup       = new Image();
    aboutusbuttonup.src   = "images/aboutus.gif" ;
    aboutusbuttondown     = new Image() ;
    aboutusbuttondown.src = "images/aboutus_rollover.gif" ;

    ourdoctorsbuttonup       = new Image();
    ourdoctorsbuttonup.src   = "images/ourdoctors.gif" ;
    ourdoctorsbuttondown     = new Image() ;
    ourdoctorsbuttondown.src = "images/ourdoctors_rollover_01.gif" ;
    
    caretreatbuttonup       = new Image();
    caretreatbuttonup.src   = "images/caretreat.gif" ;
    caretreatbuttondown     = new Image() ;
    caretreatbuttondown.src = "images/caretreat_rollover.gif" ;

    patresbuttonup       = new Image();
    patresbuttonup.src   = "images/patres.gif" ;
    patresbuttondown     = new Image() ;
    patresbuttondown.src = "images/resources_rollover.gif" ;

    appontmentbuttonup       = new Image();
    appontmentbuttonup.src   = "images/appontment.gif" ;
    appontmentbuttondown     = new Image() ;
    appontmentbuttondown.src = "images/makeappt_rollover.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" );
    }
}
// -->