function externalLinks() {
    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 = "popup";
    }
}

function ctvertPopup() {
    window.open("","popup","width=800,height=600,left=0,top=0,scrollbars=1");
}