function relTags() 
{
	if (document.getElementsByTagName) 
	{
		var anchors = document.getElementsByTagName( "a" );
		for (var loop = 0; loop < anchors.length; loop++) 
		{
			var anchor = anchors[loop];
			if (anchor.getAttribute("href") && anchor.getAttribute("rel") == "external") 
			{
				anchor.target = "_blank";
			}
		}
	}
}	

window.onload = function() 
{
	relTags();
}