if ( document.images ) {
  howtoon = new Image();
  howtoon.src = "/img/howto-but.gif";
  howtooff = new Image();
  howtooff.src = "/img/howto-but-yel.gif";

  hostingon = new Image();
  hostingon.src = "/img/hosting-but.gif";
  hostingoff = new Image();
  hostingoff.src = "/img/hosting-but-yel.gif";

  consultingon = new Image();
  consultingon.src = "/img/consulting-but.gif";
  consultingoff = new Image();
  consultingoff.src = "/img/consulting-but-yel.gif";
}

function switchPic( whBut, whSt ) {
  if ( document.images) {
    newPic = eval(whBut+whSt);
    locPic = eval ("document." + whBut);
    locPic.src = newPic.src;
  }
}