function k_prev(list) {
  if (list) {
    var n = 0; 
    for (var i=0; i<list.length; i++) {
      if ($(list[i]).style.display == 'block') n = i;
      $(list[i]).style.display = 'none';
    }
    if ($(list[n-1])) $(list[n-1]).style.display = 'block';
    else $(list[list.length-1]).style.display = 'block';  
  }
}

function k_next(list) {
  if (list) {
    var n = 0;
    for (var i=0; i<list.length; i++) {
      if ($(list[i]).style.display == 'block') n = i;
      $(list[i]).style.display = 'none';
    }
    if ($(list[n+1])) $(list[n+1]).style.display = 'block';
    else $(list[0]).style.display = 'block';  
  }
    
  
}

function setActiveStyleSheet(title) {
	if (title == '') {
		title = 'alapertelmezett';
	}
  createCookie(cookieName, title, 365);

  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
			if (a.getAttribute("href").indexOf("_ie.css") == -1) {
				a.disabled = true;
			}
			if (a.getAttribute("title") == '' || a.getAttribute("title") == title) {
				a.disabled = false;
			}
		}
		else if (a.getAttribute("rel").indexOf("style") != -1 && !a.getAttribute("title")) {
			if (a.getAttribute("href").indexOf("_ie.css") == -1) {
				a.disabled = true;
			}
			if (a.getAttribute("title") == '' || a.getAttribute("title") == title) {
				a.disabled = false;
			}
    }
  }
}

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=/";
}

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 false;
}


var cookieName = 'style';

if (readCookie(cookieName)) {
	setActiveStyleSheet(readCookie(cookieName));
}
else {
	setActiveStyleSheet('');
}