function getDocHeight(doc) {
  var docHt = 0, sh, oh;
  if (doc.height) docHt = doc.height;
  else if (doc.body) {
    if (doc.body.scrollHeight) docHt = sh = doc.body.scrollHeight;
    if (doc.body.offsetHeight) docHt = oh = doc.body.offsetHeight;
    if (sh && oh) docHt = Math.max(sh, oh);
  }
  return docHt;
}

function setIframeHeight(iframeName) {
	var iframeWin = window.frames[iframeName];
	var iframeEl = document.getElementById? document.getElementById(iframeName): document.all? document.all[iframeName]: null;
	
	if ( iframeEl && iframeWin ) {
		iframeEl.style.height = "auto"; // helps resize (for some) if new doc shorter than previous  
		var docHt = getDocHeight(iframeWin.document);
		// need to add to height to be sure it will all show
		if (docHt) iframeEl.style.height = docHt + 10 + "px";
	}
}

function abre(url,janela,larg,alt,scroll){
	if (!scroll) { scroll='auto' }
	window.open(url,janela,"toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars="+scroll+",resizable=no,copyhistory=no,width="+larg+",height="+alt);
}