_preview.js

(function(){

	var file = document.location.search.replace(/\?/,'');
	var link = document.createElement('a');
	var listing = false;

	// get directory listing if no URL provided
	if (!file){
		listing = true;
		file = '/';
	}

	// let's ajax it in
	var content = jQuery('<div>').load(file, function(res){

		var self = $(this), ext = file.split(".");

		if(ext[ext.length - 1] == "md")
		self[0].innerHTML = marked.parse(res);
		self.prependTo('#gc-content');

		// muck with the content
		if (!listing) return;

		self.find('a[href]')
			.filter('a[href$="/"]').closest('li').remove().end().end()
			.attr('href', function(el, oldattr){
				link.href = oldattr;
				return location.pathname + '?' + link.pathname.replace(/\/docs\//,'');
			});

	});

}());