function externalLinks() {
 if (!document.getElementsByTagName) return;
 var anchors = document.getElementsByTagName("a");
 for (var i=0; i<anchors.length; i++) {
   var anchor = anchors[i];
   var rel = anchor.getAttribute("rel");
   if (rel==null){
	   rel="";
   }
   if (anchor.getAttribute("href") &&
       rel.indexOf("external")>-1)
     anchor.target = "_blank";
 }
}
window.onload = externalLinks;

function clear_text(obj){
	obj.value="";
}