var show;
var hide;
if (document.getElementById){//Definition der Funktionen für Browser mit W3C-DOM-Unterstützung
  show=function(id){
    document.getElementById(id).style.visibility="visible";
  };
  hide=function(id){
    document.getElementById(id).style.visibility="hidden";
  };
} else {//Dummyfunktion für alte Browser
  show=function(id){};
  hide=function(id){};
}

var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-572296-1'],
          ['_gat._anonymizeIp'],
          ['_trackPageview']);

(function() {
  var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
  ga.src = '//www.google-analytics.com/ga.js';
  var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();