// otevira odkazy s ref=external v novem okne - kvuli nevalidite target=_blank v XHTML
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';
    }
}

function addEvent2(elm, evType, fn, useCapture)
{
 if (elm.addEventListener){
   elm.addEventListener(evType, fn, useCapture);
   return true;
 } else if (elm.attachEvent){
   var r = elm.attachEvent("on"+evType, fn);
   return r;
 }
}

addEvent2(window,'load',externalLinks);