_relToAbs = function( el ) {
	var url;
	var clone = $(el).clone()[0];
	var linkHost;

	if ( clone.nodeName.toLowerCase() === 'link' ) {
		_link.href = clone.href;
		linkHost = _link.host;

		// IE doesn't have a trailing slash on the host
		// Chrome has it on the pathname
		if ( linkHost.indexOf('/') === -1 && _link.pathname.indexOf('/') !== 0) {
			linkHost += '/';
		}

		clone.href = _link.protocol+"//"+linkHost+_link.pathname+_link.search;
	}

	return clone.outerHTML;
}
Convert a `link` tag's URL from a relative to an absolute address so it will
work correctly in the popup window which has no base URL.

@param  {node}     el Element to convert