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;