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";
 }
}

//Open URL in a full screen window
function openFullScreen(targetURL) {
	window.open(targetURL,'panowindow',fullscreen='yes',resizable='no',status='no',scrollbars='yes');
}

window.onload = externalLinks;