function external() {
  for (i in document.links) {
    link = document.links[i];

	 if (link.href && link.href.indexOf('http://')==0 && link.href.indexOf('http://kichrum.org.ua')==-1 && link.href.indexOf('http://www.perviynax.ru')==-1) {
      link.onclick = onExternalLinkActivate;
      link.onkeypress = onExternalLinkActivate;
    }
  }
}

function onExternalLinkActivate() {
     window.open(this.href);
  return false;
}

window.onload = external;