function changeSelection(obj) {
	var parent = obj.parentNode;
	var hrefs = parent.getElementsByTagName('a');
	for (var i=0; i<hrefs.length; i++) {
		hrefs[i].className="";
	}
	obj.className="active";
}

function showMessage(n) {
	var IE = document.all?true:false
	pageS = new Array();
	pages = getPageSize();
	pollX = (pages[0]/2)-230+'px';
	document.getElementById('Komunikat').style.left = pollX;
	if(IE)
		document.getElementById('Komunikat').style.top = document.documentElement.scrollTop + 150 + 'px';
	else 
		document.getElementById('Komunikat').style.top = window.pageYOffset + 150 + 'px';
	document.getElementById('Komunikat').style.display = 'block';
	document.getElementById('kText').innerHTML = n;	
}

function HideCom(){
	document.getElementById("Komunikat").style.display = "none";
}

function getPageSize(){
	  var xScroll, yScroll;
	  if (window.innerHeight && window.scrollMaxY) {
	     xScroll = document.body.scrollWidth;
	     yScroll = window.innerHeight + window.scrollMaxY;
	  } else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
	     xScroll = document.body.scrollWidth;
	     yScroll = document.body.scrollHeight;
	  } else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
	     xScroll = document.body.offsetWidth;
	     yScroll = document.body.offsetHeight;
	  }
	  var windowWidth, windowHeight;
	  if (self.innerHeight) {   // all except Explorer
	     windowWidth = self.innerWidth;
	     windowHeight = self.innerHeight;
	  } else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
	     windowWidth = document.documentElement.clientWidth;
	     windowHeight = document.documentElement.clientHeight;
	  } else if (document.body) { // other Explorers
	     windowWidth = document.body.clientWidth;
	     windowHeight = document.body.clientHeight;
	  }
	  // for small pages with total height less then height of the viewport
	  if(yScroll < windowHeight){
	     pageHeight = windowHeight;
	  } else {
	     pageHeight = yScroll;
	  }
	  // for small pages with total width less then width of the viewport
	  if(xScroll < windowWidth){
	     pageWidth = windowWidth;
	  } else {
	     pageWidth = xScroll;
	  }
	  arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight)
	  return arrayPageSize;
	}