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.href.indexOf("jeremywright") == -1 ) ) {
   if (anchor.getAttribute("href")  ) {
	 var extsiteref = anchor.href;
     anchor.href = "http://www.jeremywright.co.uk/external.php?external=" + extsiteref; 
	 anchor.target = "_blank";
	 alert(extsiteref);
 } 
 }
 }  
 }  
 window.onload = externalLinks;