function pruefeEmail() {
      if (document.forms[0].elements[4].value.indexOf ('@',0) == -1 ||
          document.forms[0].elements[4].value.indexOf ('.',0) == -1 ||
          document.forms[0].elements[4].value == 'email' ) {
             alert("\nDeine E-Mail Adresse ist fehlerhaft." +
                   "\n\nBitte korrigiere Deine Eingabe.")
                   document.forms[0].elements[4].select();
                   document.forms[0].elements[4].focus();
                   return false;
             } else {
             return true;
      }
   }

   function focusEmail() {
      document.forms[0].elements[4].focus();
   }

    var m_imageUrl = "";
    var m_satTitle = "";
    var m_imgSat = null;
    
    function zeigeBild(imageUrl, satTitle) {
    
    if((navigator.userAgent.match(/iPhone/i))||(navigator.userAgent.match(/iPod/i))||(navigator.userAgent.match(/iPad/i))) {
    // do nothing
    } else {
    
    m_imageUrl = imageUrl;
    m_satTitle = satTitle;
    m_imgSat = open("bildanzeige.html", "sat", "left=5,top=5,width=600,height=600,scrollbars=yes,dependant=yes,status=no,resizable=yes,menubar=no,toolbar=no");
    m_imgSat.focus();
    }
    }
    
    function getImageUrl() {
        return m_imageUrl;
    }
    
    function getSatTitle() {
        return m_satTitle;
    }
    
    function forceSatClose() {
        if ( m_imgSat != null) {
            m_imgSat.close();
        }
    }

   var message="Diese Funktion wurde aus urheberrechtlichen Gründen deaktiviert";
   //Fuer den Microsoft IE
   function clickIE4()
      {
      if (event.button==2){
         // alert(message);
         return false;
         }
      }
   //Fuer Mozilla/Firefox
   function clickNS4(e)
      {
      if (document.layers||document.getElementById&&!document.all){
         if (e.which==2||e.which==3){
            // alert(message);
            return false;
            }
         }
      }
      if (document.layers)
      {
      document.captureEvents(Event.MOUSEDOWN);
      document.onmousedown=clickNS4;
      }
      else if (document.all&&!document.getElementById)
      {
      document.onmousedown=clickIE4;
      }
      // document.oncontextmenu=new Function("alert(message);return false")
      document.oncontextmenu=new Function("return false")