function AddToFaves_hp(){
 var is_4up = parseInt(navigator.appVersion);
 var is_mac   = navigator.userAgent.toLowerCase().indexOf("mac")!=-1;
 var is_ie   = navigator.userAgent.toLowerCase().indexOf("msie")!=-1;
 var thePage = location.href;
 if (thePage.lastIndexOf('#')!=-1)
  thePage = thePage.substring(0,thePage.lastIndexOf('#'));
  if (is_ie && is_4up && !is_mac) 
   window.external.AddFavorite("http://www.gwf-mengele.de");
  else if (is_ie || document.images)
   booker_hp = window.open("fileadmin/gwf/static/booker.html",'booker_','width=350,height=200,left=40,top=40,scrollbars=yes');
}

function AddToFaves_hp_en(){
 var is_4up = parseInt(navigator.appVersion);
 var is_mac   = navigator.userAgent.toLowerCase().indexOf("mac")!=-1;
 var is_ie   = navigator.userAgent.toLowerCase().indexOf("msie")!=-1;
 var thePage = location.href;
 if (thePage.lastIndexOf('#')!=-1)
  thePage = thePage.substring(0,thePage.lastIndexOf('#'));
  if (is_ie && is_4up && !is_mac) 
   window.external.AddFavorite("http://www.gwf-mengele.de");
  else if (is_ie || document.images)
   booker_hp = window.open("fileadmin/gwf/static/booker_en.html",'booker_','width=350,height=200,left=40,top=40,scrollbars=yes');
}