//skript pro prehozeni skinu
//nacteni skinu z cookies po nacteni stranky
function loadSkin()
{
  var selectedSkin = readCookie('skin');

  //zvoleni skinu
  if (selectedSkin == 'green')
  {
    document.getElementById('orange').disabled = true;
    document.getElementById('green').disabled = false;
    document.getElementById('orange_anchor').style.fontWeight = "normal";
    document.getElementById('green_anchor').style.fontWeight = "bold";
  }
  else
  {
    document.getElementById('orange').disabled = false;
    document.getElementById('green').disabled = true;
    document.getElementById('orange_anchor').style.fontWeight = "bold";
    document.getElementById('green_anchor').style.fontWeight = "normal";
  }
}
//prehozeni skinu po kliknuti na odkaz
function changeSkin(skin)
{
  createCookie('skin',skin,'');
  if (skin == 'green')
  {
    document.getElementById('orange').disabled = true;
    document.getElementById('green').disabled = false;
    document.getElementById('orange_anchor').style.fontWeight = "normal";
    document.getElementById('green_anchor').style.fontWeight = "bold";
  }
  else
  {
    document.getElementById('orange').disabled = false;
    document.getElementById('green').disabled = true;
    document.getElementById('orange_anchor').style.fontWeight = "bold";
    document.getElementById('green_anchor').style.fontWeight = "normal";    
  }        
}

//funkce pro praci s cookies
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 var 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 null;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}