function addbookmark()
{
if(document.all)
  window.external.AddFavorite('http://www.inGraph.pl','inGraph');
}

function TestDane()
{
	var tresc = document.getElementById("id_tresc").value;
	var osoba = document.getElementById("id_osoba").value;
	var tel = document.getElementById("id_tel").value;
	var mail = document.getElementById("id_mail").value;
	
	if( (tresc == "") || (osoba == "") || (tel == "") || (mail == ""))
		document.getElementById("przycisk").style.visibility = "hidden";
	else
		document.getElementById("przycisk").style.visibility = "visible";
}