// <![CDATA[
var uhrzeit = new Date();
var aktuell = uhrzeit.getHours();
if ( aktuell >= 7 && aktuell <= 19 ) {
  if ( navigator.appName == "Microsoft Internet Explorer" ) {
    document.write('<link rel="stylesheet" type="text/css" href="css/screen_day.css" media="screen, print" />');
  } else {
    document.write('<link rel="preferred stylesheet" type="text/css" href="css/screen_day.css" media="screen, print" title="day"/><link rel="alternate stylesheet" type="text/css" href="css/screen_sunset.css" media="screen, print" title="sunset"/>');
  }
} else {
  if ( navigator.appName == "Microsoft Internet Explorer" ) {
    document.write('<link rel="stylesheet" type="text/css" href="css/screen_sunset.css" media="screen, print" />');
  } else {
    document.write('<link rel="preferred stylesheet" type="text/css" href="css/screen_sunset.css" media="screen, print" title="sunset"/><link rel="alternate stylesheet" type="text/css" href="css/screen_day.css" media="screen, print" title="day"/>');
  }
}

function externalLinks() {
 if (!document.getElementsByTagName) return; 
 var anchors = document.getElementsByTagName("a"); 
 for (var i=0; i<anchors.length; i++) { 
  var anchor = anchors[i]; 
  if (anchor.getAttribute("href") && anchor.getAttribute("rel") == "external") 
  anchor.target = "_blank"; 
 } 
} 
window.onload = externalLinks;
// ]]>