var NS = (navigator.appName == "Netscape") ? 1 : 0;
if (NS)
  { 
  if(navigator.appVersion.substr(0,1) <= "4")
    {
    document.captureEvents(Event.DBLCLICK); //Netscape4
    }
  else
    {
    document.addEventListener("dblclick",auslesen,true); //Mozilla/NS6/7 
    }
  }
document.ondblclick = auslesen;

var fenster;
function auslesen()
  {
  if (NS)
    {
    textvar = document.getSelection();
    oeffnefenster(textvar);
    }
  else
    {
    textvar = document.selection.createRange();
    if(document.selection.type == 'Text' && textvar.text != '')
      {
      document.selection.empty();
      oeffnefenster(textvar.text);
      }
    }
  }

function oeffnefenster(suche)
  {
  if (suche > '')
    {
    SUCHSTRING = 'http://de.wikipedia.org/wiki/'+suche;  // URL der neuen Seite - individuell anpassen
    fenster = window.open(SUCHSTRING, 'Suchfenster', 'width=650, height=400, resizable=yes, menubar=no, toolbar=no, scrollbars=yes');
    setTimeout('fenster.focus()', 50);
    }
  }