//function to open external links in a new window
function extLinks() {
 //alert('INIT');
 // if the browser does not support DOM 1.0, return to the page and halt the script
 if (!document.getElementsByTagName) return;
 //get all the links on the page and place them into an array
 var arrAnchors = document.getElementsByTagName("a");
 // for each element in the anchors array
 for (var i = 0; i < arrAnchors.length; i++) {
   //set a local temp var to hold the current link
   var aElem = arrAnchors[i];
   //if the link contains our 'rel="external"' attribute
   if (aElem.getAttribute("href") &&
       aElem.getAttribute("rel") == "external")
     //set its' target attribute to '_blank'
	 aElem.target = "_blank";
 }
}
//when the document has finished loading, call the function
window.onload = extLinks;