var externalLinks = function ()
{
	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;