// JavaScript Document

function roll(img_name1, img_src1, img_name2, img_src2){
	document[img_name1].src = img_src1;
	document[img_name2].src = img_src2;
   };

function Big(img_name1, img_src1, img_name2, img_src2){
	document[img_name1].src = img_src1;
	document[img_name2].src = img_src2;
   }
   
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.getAttribute("href") && 
       anchor.getAttribute("rel") == "external") 
     anchor.target = "_blank"; 
 } 
} 
window.onload = externalLinks;