window.onload = externalLinks;



function externalLinks() {

 if(!document.getElementsByTagName) return;

 var links_marcus,a,i;

 links_marcus = document.getElementsByTagName("a");

 for(i=0;i<links_marcus.length;i++) {

 a = links_marcus[i];

 if(a.getAttribute("rel") && a.getAttribute("rel").indexOf("external") > -1) {

   	 a.onclick = function() {

   	   	 window.open(this.href);

   	   	 return false;

   	 }

 	 }

 }

}