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.getAttribute("rel")=="external nofollow" ||
anchor.getAttribute("rel")=="nofollow external")
)
anchor.target="_blank";
}
}
window.onload = function() {
externalLinks();
}