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" );
    }
  }
  function buttonclick ( buttonname )
  {
    if (document.images) {
      document[buttonname].src = eval( buttonname + "click.src" );
    }
  }


if (document.images) {
homeup=new Image();
homeup.src="../images/link_buttons/home.jpg";
homedown=new Image();
homedown.src="../images/link_buttons/home2.jpg";
homeclick=new Image();
}

if (document.images) {
aboutup=new Image();
aboutup.src="../images/link_buttons/about.jpg";
aboutdown=new Image();
aboutdown.src="../images/link_buttons/about2.jpg";
aboutclick=new Image();
}

if (document.images) {
availableup=new Image();
availableup.src="../images/link_buttons/available.jpg";
availabledown=new Image();
availabledown.src="../images/link_buttons/available2.jpg";
availableclick=new Image();
}

if (document.images) {
photoup=new Image();
photoup.src="../images/link_buttons/photos.jpg";
photodown=new Image();
photodown.src="../images/link_buttons/photos2.jpg";
photoclick=new Image();
}

if (document.images) {
emailup=new Image();
emailup.src="../images/link_buttons/email.jpg";
emaildown=new Image();
emaildown.src="../images/link_buttons/email2.jpg";
emailclick=new Image();
}