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") == "pop") {
        anchor.onclick = function ()
			{
				  return pop(this.href)
			}
    } else if (anchor.getAttribute("href") && anchor.getAttribute("rel") == "external") {
      anchor.target = "_blank";
    }
   }
}
 
 // Popup

var popUp = null;

function pop(url)
{
	if (popUp && !popUp.closed)
		popUp.location.href = url;
	else
		popUp = window.open(url,'popUp','height=400,width=450,scrollbars=yes,resizable=yes,toolbar=no,location=no, top=10, left=50');
	popUp.focus();
	return false;
}


 window.onload = externalLinks;