// JavaScript Document - jgt 20090324 - code to open anchors marked with rel="external" in a new window, rather than setting target="_blank". from http://erikvold.com/blog/index.cfm/2008/12/3/open-external-links-as-blank-targets-via-unobtrusive-javascript-microformat-safe-version
function externalLinks(){
   if (!document.getElementsByTagName) return;
   var externalRegExp = /(^|\s)external($|\s)/i;
   var anchors = document.getElementsByTagName("a");
   for (var i=0;i<anchors.length;i++){
      var anchor = anchors[i];
      if(
         anchor.getAttribute("href")
         &&   ( !anchor.getAttribute("target") || anchor.getAttribute("target") == ""
            )
         &&   ( externalRegExp.test(anchor.getAttribute("rel")) )
      )
      anchor.target = "_blank";
   }
   return;
}