var xmlHttp;
  try
    {
    // Firefox, Opera 8.0+, Safari
    xmlHttp=new XMLHttpRequest();
    }
  catch (e)
    {
    // Internet Explorer
    try
      {
      xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
      }
    catch (e)
      {
      try
        {
        xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
        }
      catch (e)
        {
        alert("Your browser does not support AJAX!");
        //return false;
        }
      }
    }
	
function setActiveStyleSheet(title) 
{
  var i, a, main;     
	
	for(i=0; (a = document.getElementsByTagName("link")[i]); i++)
   {
		if(a.getAttribute("rel").indexOf("style") != -1 && ( a.getAttribute("title") || a.getAttribute("id") ) )
		{
			a.disabled = true;	
		
			if ( (title == "style_black") &&  ( a.getAttribute("id") == "layout_black" ))
			{
				a.disabled = false;
				correctPNG();
			}			
				
			if ( (title != "style_black") &&  ( a.getAttribute("id") == "layout" ))
				a.disabled = false;	
			if(a.getAttribute("title") == title) a.disabled = false;	
		}		
   }
   
   if (title != "style_black")
		displayPNG();
	
	xmlHttp.open("GET","switcher.php?css="+title,true);
	xmlHttp.send(null);
	var t = getActiveStyleSheet();
	document.cookie = "style="+t+"; path=/";
}

function correctPNG()
{
	for(var i=0; i<document.images.length; i++)
	{
		var img = document.images[i];
		
		var new_image = img.src.replace('/images/', '/images_bw/');
		if(new_image)
		{
			img.src = new_image;
		}
	}
}

function displayPNG()
{
	for(var i=0; i<document.images.length; i++)
	{
		var img = document.images[i];
		
		var new_image = img.src.replace('/images_bw/', '/images/');
		if(new_image)
		{
			img.src = new_image;
		}
	}
}

function displayThePictures()
{
	var actual_style = getActiveStyleSheet();
	
	if (actual_style == "style_black")
		correctPNG();
}

function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) 
  {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) 
	{
		
		return a.getAttribute("title");
	}	
  }
  return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}

function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
 
 // alert(document.cookie);
}

function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}

window.onload = function(e) {
  //var cookie = readCookie("style");
  //if (cookie == null)
var	cookie = valami;
alert(valami);
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}
	var	cookie = valami;

  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
/*
var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet(); 
setActiveStyleSheet(title);*/