var version=parseInt(navigator.appVersion.charAt(0));
if (navigator.appName=="Netscape" && version==4)
{
  window.document.captureEvents(Event.MOUSEDOWN);
}
window.document.onmousedown = taste;
function taste(evt)
 {
 if (navigator.appName=="Microsoft Internet Explorer")
  {
  if (event.button==2)
   {
   alert ("Nicht verfügbar!");
   return false;
   }
  }
 if (navigator.appName=="Netscape")
  {
  if (evt.which==3)
   {
   alert ("Nicht verfügbar!");
   return false;
   }
 }
}

function extlink(url)
{
window.open(url);
}

function back()
{
var eintraege=window.history.length;
if (eintraege!=0)
{
history.back();
}
else
{
window.open("http://www.raga.de/index.html");
}
}