function iFrameHeight() {
  var h = 0;
  if ( !document.all ) {
    h = document.getElementById('costaricaiframe').contentDocument.height;
    document.getElementById('costaricaiframe').style.height = h + 60 + 'px'; 
  } else if( document.all ) {
    h = document.frames('costaricaiframe').document.body.scrollHeight;
    document.all.costaricaiframe.style.height = h + 20 + 'px'; 
  }       
}