var xmlHttp;

function vytvorXMLHttpRequest(){
    if (window.ActiveXObject){
        xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
    } else if (window.XMLHttpRequest){
        xmlHttp = new XMLHttpRequest();
    }
}

function ajax(url,kam){
    
    vytvorXMLHttpRequest();
    xmlHttp.onreadystatechange = zpracujZmenuStavu;
    xmlHttp.open("GET", url, true);
    xmlHttp.send(null);
    
    function zpracujZmenuStavu(){
        if(xmlHttp.readyState == 4){
            if (xmlHttp.status == 200){
            document.getElementById(kam).innerHTML = xmlHttp.responseText;
            }
        }
    }
}

function starsUp(num){
      for(i=1;i<=10;i++){
          var starName = "star_" + i;
          if(i<=num){
              document.getElementById(starName).src="img/star_active.png";
          } else {
              document.getElementById(starName).src="img/star_inactive.png";
          }   
      }
}

function starsOut(num){
      for(i=1;i<=10;i++){
          var starName = "star_" + i;
          if(i<=num){
              document.getElementById(starName).src="img/star_active.png";
          } else {
              document.getElementById(starName).src="img/star_inactive.png";
          } 
      }
}

function AddFavorite(linkObj,addUrl,addTitle)
    {
      if (document.all && !window.opera)
      {
        window.external.AddFavorite(addUrl,addTitle);
        return false;
      }
      else if (window.opera && window.print)
      {
        linkObj.title = addTitle;
        return true;
      }
      else if ((typeof window.sidebar == 'object') && (typeof window.sidebar.addPanel == 'function'))
      {
        if (window.confirm('Přidat oblíbenou stránku jako nový panel?'))
        {
          window.sidebar.addPanel(addTitle,addUrl,'');
          return false;
        }
      }
      window.alert('Po potvrzení stiskněte CTRL-D,\n poté bude stránka přidána mezi Vaše oblíbené odkazy.');
      return false;
    }