function popUp(URL) {
day = new Date();
id = day.getTime();
eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=1,location=1,statusbar=0,menubar=0,resizable=1,width=471,height=400,left = 312,top = 184');");
}

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";
 }
} 
window.onload = externalLinks;