function isIE() {
	var version = 0;
	if (navigator.appVersion.indexOf("MSIE")!=-1) {
		temp=navigator.appVersion.split("MSIE");
		version=parseFloat(temp[1]);
	}
	
	if (version>=5.5) {
		return true;
	} 
	
	return false;
}

function m_over(node) {
	if (!isIE()) return true;
	
	node.className="over";
	return true;
}

function m_out(node) {	
	if (!isIE) return true;

	node.className="out";
	return true;
}

function subs(pole)
{
  if(!/^w[w.-]+w@w([w.-]+w.)+[a-z]{2,4}$/i.test(subsk.email.value))
  {
    alert('Wpisz e-mail!');
    return false;
  }
}

function switchnews() {
    if (document.getElementById('morenews').style.display=='block') {
        document.getElementById('morenews').style.display='none';
        document.getElementById('morenews_text').innerHTML='Odkryj więcej newsów ↓';
    } else {
        document.getElementById('morenews').style.display='block';
        document.getElementById('morenews_text').innerHTML='Schowaj dodatkowe newsy ↑';
    }
}

function showwindow(win) { 
    document.getElementById('at1').className='';
    document.getElementById('at2').className='';
    document.getElementById('at3').className='';
    document.getElementById('at' + win).className='sel';

	document.getElementById('t1').style.display = 'none'; 
	document.getElementById('t2').style.display = 'none'; 
	document.getElementById('t3').style.display = 'none'; 
	document.getElementById('t' + win).style.display = 'block';
}

function shownwindow(win) { 
    document.getElementById('nat1').className='';
    document.getElementById('nat2').className='';
    document.getElementById('nat3').className='';
    document.getElementById('nat' + win).className='sel';

	document.getElementById('nt1').style.display = 'none'; 
	document.getElementById('nt2').style.display = 'none'; 
	document.getElementById('nt3').style.display = 'none'; 
	document.getElementById('nt' + win).style.display = 'block';
}

function switchlogowanie() {

    if (document.getElementById('logowanie').style.display=='block')
    {
         document.getElementById('logowanie').style.display='none';
         document.getElementById('logowanie_text').innerHTML='ZALOGUJ';
    }  else
    {
         document.getElementById('logowanie').style.display='block';
         document.getElementById('logowanie_text').innerHTML='ZAMKNIJ';
    }
}

function popup(mylink, windowname)
{
if (! window.focus)return true;
var href;
if (typeof(mylink) == 'string')
   href=mylink;
else
   href=mylink.href;
window.open(href, windowname, 'width=444,height=333,scrollbars=yes');
return false;
}

function setCheckboxes(theForm, elementName, isChecked)
{
  var chkboxes = document.forms[theForm].elements[elementName];
  var count = chkboxes.length;
  if (count)
  {
    for (var i = 0; i < count; i++)
    {
      chkboxes[i].checked = isChecked;
    }
  }
  else
  {
    chkboxes.checked = isChecked;
  }
  return true;
}