/* open links to binary documents and non-southampton.ac.uk pages in new window */
function extLinks() {
	if ((!document.getElementsByTagName) || (!document.getElementById)) return;
	var clnks = document.getElementsByTagName("a");
	for (var i = 0; i < clnks.length; i++) {
		var trgt = clnks[i].getAttribute("href");
		var any_action = clnks[i].getAttribute("onclick");
		check_action = new RegExp("^javascript", "i");
		int_link = new RegExp("^[/|#].*");
		doc_link = new RegExp("^.*\.(doc|ppt|pps|pdf|xls|mp3)$");
		if ((trgt != null) && (trgt != "") && (any_action == null) && (!trgt.match(check_action))) {
		if ((trgt.match("www.portusproject.org")) || (trgt.match(int_link))) {
		if (trgt.match(doc_link)) {
					clnks[i].target = "_blank"; 
				} else {
					clnks[i].target = "_self"; 
				}
			} else {
				clnks[i].target = "_blank";
			}
		}
	}
}