function iFrameHeight() {
 if(document.getElementById && !(document.all)) {
  parent.document.getElementById("screen").style.height = 0;
  h = parent.document.getElementById("screen").contentDocument.body.scrollHeight;
  parent.document.getElementById("screen").style.height = h + 30;
 } else if(document.all) {
  h = parent.document.frames("screen").document.body.scrollHeight;
  parent.document.all.screen.style.height = h + 30;
 }
}