function go() {

externalLinks();

}


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") == "op")

     anchor.target = "_blank";

 }

}



function addLoadEvent(func)

{	

	var oldonload = window.onload;

	if (typeof window.onload != 'function'){

    	window.onload = func;

	} else {

		window.onload = function(){

		oldonload();

		func();

		}

	}

}




addLoadEvent(go);