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"))
   { 
       if(anchor.getAttribute("href").indexOf("joyloft.net")==-1)
	{
		anchor.target = "_blank"; 
	}
	else
	{
		anchor.target = "_self"; 
	}
   }    
 } 
}

window.onload = externallinks