function m_addLoadEvent(func) {
  var oldOnload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  }
  else {
    window.onload = function() {
      oldOnload();
      func();
    }
  }
}

function m_externalLinks() {
  if (!document.getElementsByTagName) {
    return;
  }
  var anchors = document.getElementsByTagName("a");
  for (var i = 0; i < anchors.length; i++) {
    var anchor = anchors[i];
    var rel = anchor.getAttribute("rel");
    if (
      anchor.href
      && anchor.href.length > 0
      && (
        (
          rel
          && rel.length > 0
          && rel.indexOf("blank") >= 0
        )
        || (
          (
            !rel
            || !rel.length
            || rel.indexOf("self") < 0
          )
          && anchor.hostname != document.location.hostname
        )
      )
    ) {
      anchor.target = "_blank";
      anchor.title = (anchor.title ? anchor.title + " " : "") + "click here";
    }
  }
}
m_addLoadEvent(m_externalLinks);