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";  
		}
	}  
}