function inform(message){
      alert(message);
}

function changenavigation(action){
  var innerText = ""; 

  switch (action){
	  case 'home':  

	innerText+= "<a href=\"home.html\" target=\"content\"><div id=\"activnavigation\" style=\"left: 40px;\"><p class=\"navigationfont\">Startseite</p></div></a>";
	innerText+= "<a href=\"list.php\" target=\"content\"><div id=\"navigation\" style=\"left: 160px;\"><p class=\"navigationfont\">Auswahl</p></div></a>";
	innerText+= "<a href=\"webtv.php\" target=\"content\"><div id=\"navigation\" style=\"left: 280px;\"><p class=\"navigationfont\">Web TV</p></div></a>";
	innerText+= "<a href=\"download.php?sort=date\" target=\"content\"><div id=\"navigation\" style=\"left: 400px;\"><p class=\"navigationfont\">My Download</p></div></a>";
// 	innerText+= "<a href=\"contact.html\" target=\"content\"><div id=\"navigation\" style=\"left: 550px;\"><p class=\"navigationfont\">Hilfe</p></div></a>";		
	innerText+= "<a href=\"contact.html\" target=\"content\"><div id=\"navigation\" style=\"left: 670px;\"><p class=\"navigationfont\">Kontakt</p></div></a>";
      
      document.getElementById("navigationleft").innerHTML = innerText;
      break;
	  case 'impressum':  

      innerText+= "<a href=\"home.html\" target=\"content\"><div id=\"navigation\" style=\"left: 40px;\"><p class=\"navigationfont\">Startseite</p></div></a>";
	    innerText+= "<a href=\"list.php\" target=\"content\"><div id=\"navigation\" style=\"left: 160px;\"><p class=\"navigationfont\">Auswahl</p></div></a>";
	innerText+= "<a href=\"webtv.php\" target=\"content\"><div id=\"navigation\" style=\"left: 280px;\"><p class=\"navigationfont\">Web TV</p></div></a>";
	    innerText+= "<a href=\"download.php?sort=date\" target=\"content\"><div id=\"navigation\" style=\"left: 400px;\"><p class=\"navigationfont\">My Download</p></div></a>";
			innerText+= "<a href=\"contact.html\" target=\"content\"><div id=\"navigation\" style=\"left: 670px;\"><p class=\"navigationfont\">Kontakt</p></div></a>";
      
      document.getElementById("navigationleft").innerHTML = innerText;
      break;      
    case 'list':  

      innerText+= "<a href=\"home.html\" target=\"content\"><div id=\"navigation\" style=\"left: 40px;\"><p class=\"navigationfont\">Startseite</p></div></a>";
	    innerText+= "<a href=\"list.php\" target=\"content\"><div id=\"activnavigation\" style=\"left: 160px;\"><p class=\"navigationfont\">Auswahl</p></div></a>";
	innerText+= "<a href=\"webtv.php\" target=\"content\"><div id=\"navigation\" style=\"left: 280px;\"><p class=\"navigationfont\">Web TV</p></div></a>";
	    innerText+= "<a href=\"download.php?sort=date\" target=\"content\"><div id=\"navigation\" style=\"left: 400px;\"><p class=\"navigationfont\">My Download</p></div></a>";
			innerText+= "<a href=\"contact.html\" target=\"content\"><div id=\"navigation\" style=\"left: 670px;\"><p class=\"navigationfont\">Kontakt</p></div></a>";
      
      document.getElementById("navigationleft").innerHTML = innerText;
      break;
    case 'webtv':  

      innerText+= "<a href=\"home.html\" target=\"content\"><div id=\"navigation\" style=\"left: 40px;\"><p class=\"navigationfont\">Startseite</p></div></a>";
	    innerText+= "<a href=\"list.php\" target=\"content\"><div id=\"navigation\" style=\"left: 160px;\"><p class=\"navigationfont\">Auswahl</p></div></a>";
	innerText+= "<a href=\"webtv.php\" target=\"content\"><div id=\"activnavigation\" style=\"left: 280px;\"><p class=\"navigationfont\">Web TV</p></div></a>";
	    innerText+= "<a href=\"download.php?sort=date\" target=\"content\"><div id=\"navigation\" style=\"left: 400px;\"><p class=\"navigationfont\">My Download</p></div></a>";
			innerText+= "<a href=\"contact.html\" target=\"content\"><div id=\"navigation\" style=\"left: 670px;\"><p class=\"navigationfont\">Kontakt</p></div></a>";
      
      document.getElementById("navigationleft").innerHTML = innerText;
      break;
    case 'download':  

      innerText+= "<a href=\"home.html\" target=\"content\"><div id=\"navigation\" style=\"left: 40px;\"><p class=\"navigationfont\">Startseite</p></div></a>";
	    innerText+= "<a href=\"list.php\" target=\"content\"><div id=\"navigation\" style=\"left: 160px;\"><p class=\"navigationfont\">Auswahl</p></div></a>";
	 innerText+= "<a href=\"webtv.php\" target=\"content\"><div id=\"navigation\" style=\"left: 280px;\"><p class=\"navigationfont\">Web TV</p></div></a>";
	   innerText+= "<a href=\"download.php?sort=date\" target=\"content\"><div id=\"activnavigation\" style=\"left: 400px;\"><p class=\"navigationfont\">My Download</p></div></a>";
			innerText+= "<a href=\"contact.html\" target=\"content\"><div id=\"navigation\" style=\"left: 670px;\"><p class=\"navigationfont\">Kontakt</p></div></a>";
      
      document.getElementById("navigationleft").innerHTML = innerText;
      break;
    case 'contact':  

      innerText+= "<a href=\"home.html\" target=\"content\"><div id=\"navigation\" style=\"left: 40px;\"><p class=\"navigationfont\">Startseite</p></div></a>";
	    innerText+= "<a href=\"list.php\" target=\"content\"><div id=\"navigation\" style=\"left: 160px;\"><p class=\"navigationfont\">Auswahl</p></div></a>";
	innerText+= "<a href=\"webtv.php\" target=\"content\"><div id=\"navigation\" style=\"left: 280px;\"><p class=\"navigationfont\">Web TV</p></div></a>";
	    innerText+= "<a href=\"download.php?sort=date\" target=\"content\"><div id=\"navigation\" style=\"left: 400px;\"><p class=\"navigationfont\">My Download</p></div></a>";
			innerText+= "<a href=\"contact.html\" target=\"content\"><div id=\"activnavigation\" style=\"left: 670px;\"><p class=\"navigationfont\">Kontakt</p></div></a>";
      
      document.getElementById("navigationleft").innerHTML = innerText;
      break;
    case 'logedin':  

      innerText+= "<a href=\"login_functions.php?action=logout\" target=\"hidden\"><div id=\"activnavigation\" style=\"right: 40px;\"><p class=\"navigationfont\">Logout</p></div></a>";
	    
      document.getElementById("navigationright").innerHTML = innerText;
      break;
    case 'login':  
    
      innerText+= "<a href=\"home.html\" target=\"content\"><div id=\"navigation\" style=\"left: 40px;\"><p class=\"navigationfont\">Startseite</p></div></a>";
	    innerText+= "<a href=\"list.php\" target=\"content\"><div id=\"navigation\" style=\"left: 160px;\"><p class=\"navigationfont\">Auswahl</p></div></a>";
	innerText+= "<a href=\"webtv.php\" target=\"content\"><div id=\"navigation\" style=\"left: 280px;\"><p class=\"navigationfont\">Web TV</p></div></a>";
	    innerText+= "<a href=\"download.php?sort=date\" target=\"content\"><div id=\"navigation\" style=\"left: 400px;\"><p class=\"navigationfont\">My Download</p></div></a>";
			innerText+= "<a href=\"contact.html\" target=\"content\"><div id=\"navigation\" style=\"left: 670px;\"><p class=\"navigationfont\">Kontakt</p></div></a>";
      
      document.getElementById("navigationleft").innerHTML = innerText;
      break;
	 case 'logout':  

      innerText+= "<a href=\"login.php\" target=\"content\"><div id=\"navigation\" style=\"right: 40px;\"><p class=\"navigationfont\">Login</p></div></a>";
	    
      document.getElementById("navigationright").innerHTML = innerText;
      break;}
}