function externalLinks() {     
if (!document.getElementsByTagName) return;     
var anchors = document.getElementsByTagName("a");     
var map = {external:"_blank", border:"border",mplayer:"mplayer"};     
var anchor, i, target;     
for (i=0; anchor=anchors[i++];)         
if( anchor.getAttribute("href") && (target=map[anchor.getAttribute("rel")]))             
anchor.setAttribute("target", target);    } 
window.onload = externalLinks;