function isEmail(s) {
	return s != "" 	&& s.match(/^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9])+$/);	
}

noweOkienko = null;
function wnd(src, nazwa, w, h)
{
  if(window.screen){
    aw=screen.availWidth;
	ah=screen.availHeight;
  }else{
    aw=800;
    ah=600;
  }
  
	w = w > aw ? aw : w;
  	h = h > ah ? ah : h;
  
  //if(noweOkienko==null || noweOkienko.closed){
    ustawienia=
     "left=" + (aw-w)/2 + ", "
    +"top=" + (ah-h)/2 + ", "
    +"screenX=" + (aw-w)/2 + ", "
    +"screenY=" + (ah-h)/2 + ", "
    +"width=" + w + ", "
    +"height=" + h + ", "
    +"innerWidth=" + w + ", "
    +"innerHeight=" + h + ", "
    +"toolbar=no, "
    +"location=no, "
    +"directories=no, "
    +"status=no, "
    +"menubar=no, "
    +"resizable=yes, "
	+"status=no";
   if( w == aw || h == ah ) ustawienia += ", scrollbars=yes ";
	
	noweOkienko = window.open(src,nazwa,ustawienia);

  //}
  noweOkienko.focus();
  return noweOkienko;
}


function powieksz(el, fname, s, w)
{
	wys = w + 5;
	szer = s + 25;

	  if(window.screen){
		aw=screen.availWidth;
		ah=screen.availHeight;
	  }else{
		aw=640;
		ah=450;
	  }

	  if (szer>810) szer = 810;
	  if (wys>610) wys = 610;

	str = "foto.php?dir="+escape(el)+"&ph="+escape(fname);
	var win = window.open(str,"zoom","width="+szer+", height="+wys+", left="+(aw-szer)/2+", top="+ (ah-wys)/2+", titlebar=no, status=no, toolbar=no, menubar=no, location=no, resizable=yes, scrollbars=yes, fullscreen=no");
	win.focus();

}


function Print(patch)
{
	w=750;
	h=350;
  if(window.screen){
    aw=screen.availWidth;
    ah=screen.availHeight;
  }else{
    aw=640;
    ah=450;
  }
  //if(noweOkienko==null || noweOkienko.closed){
    ustawienia=
     "left=" + (aw-w)/2 + ", "
    +"top=" + (ah-h)/2 + ", "
    +"screenX=" + (aw-w)/2 + ", "
    +"screenY=" + (ah-h)/2 + ", "
    +"width=" + w + ", "
    +"height=" + h + ", "
    +"innerWidth=" + w + ", "
    +"innerHeight=" + h + ", "
    +"toolbar=yes, "
    +"location=no, "
    +"directories=no, "
    +"status=no, "
    +"menubar=yes, "
    +"scrollbars=yes, "
    +"resizable=yes, "
	+"status=no";
	noweOkienko = window.open(patch, "print", ustawienia);

  //}
  return noweOkienko;
}


function mySend(f)
{
	if (!CheckEMail(f.ml.value))
	{
		alert("Podaj poprawnie adres e-mail...");
		f.ml.focus();
		return;
	}
	return true;
}

function CheckEMail(adres)
{
	if (adres.indexOf('@') == -1)
		return false;
	if (adres.length < 4)
		return false;
	if (adres.indexOf('@') != adres.lastIndexOf('@'))
		return false;
	if (adres.indexOf(' ') != -1)
		return false;
	return true;
}


function td_switch(object, class_name)
{
	if (navigator.userAgent.indexOf("Opera")<0)
	{
		object.className=class_name;
	}
}

function tr_change(obj, class_name)
{
	if (navigator.userAgent.indexOf("Opera")<0)
	{
//		obj = document.getElementById(object);
		if (obj.className=='tr_on')
			obj.className=class_name;
		else
			obj.className='tr_on';
	}
/*
	if (object.className=='tr_on')
		object.className=class_name;
	else
		object.className='tr_on';
	*/
//	alert(object.className);
	return true;
}

function td_change(object)
{
	if (navigator.userAgent.indexOf("Opera")<0)
	{
		if (object.className=='td_on')
			object.className='td_off';
		else
			object.className='td_on';
	}
}