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"; 
			anchor.title = anchor.title + " (opens in a new browser window)";
			
			var children = anchor.childNodes;
			if (children[0].tagName=="IMG") children[0].alt = children[0].alt + " (opens in a new browser window)";
    		}
 	} 
} 
window.onload = externalLinks;