learnmore_mouseover = new Image ( );
learnmore = new Image ( );

learnmore_mouseover.src = "images/learnmore_mouseover.png";
learnmore.src = "images/learnmore.png";

function button_on ( imgId )
{
  if ( document.images )
  {
    butOn = eval ( imgId + "_mouseover.src" );
    document.getElementById(imgId).src = butOn;
  }
}

function button_off ( imgId )
{
  if ( document.images )
  {
    butOff = eval ( imgId + ".src" );
    document.getElementById(imgId).src = butOff;
  }
}