function megrendel_ellenoriz()
{
	if (document.rendel.nev.value == "")
	{
		alert('Nincs név megadva!')
		return false;
	}
	if (document.rendel.cime.value == "")
	{
		alert('Nincs cím megadva!')
		return false;
	}
	if (document.rendel.tel.value == "")
	{
		alert('Nincs telefonszám megadva!')
		return false;
	}
	if (document.rendel.datum.value == "")
	{
		alert('Nincs dátum megadva!')
		return false;
	}
	if (confirm ('Biztosan elküldi a megrendelést?') == true)
	{
		document.rendel.submit;
	}
	else
	{
		return false;
	}
}

function wopen(url, name, w, h)
{
  // Fudge factors for window decoration space.
  // In my tests these work well on all platforms & browsers.
  w += 32;
  h += 96;
  wleft = (screen.width - w) / 2;
  wtop = (screen.height - h) / 2;
  var win = window.open(url,
    name,
    'width=' + w + ', height=' + h + ', ' +
    'left=' + wleft + ', top=' + wtop + ', ' +
    'location=no, menubar=no, ' +
    'status=no, toolbar=no, scrollbars=no, resizable=no');
  // Just in case width and height are ignored
  win.resizeTo(w, h);
  // Just in case left and top are ignored
  win.moveTo(wleft, wtop);
  win.focus();
}