code: function(urls) {
  		var self = this;
  		if (typeof urls === 'string') {
  			urls = [ urls ];
  		}
  		$.each(urls, function(i, url) {
  			url = self.convAbsUrl(url).replace(/^https?:/i, '');
  			if (! $("head > link[href='+url+']").length) {
  				$('head').append('<link rel="stylesheet" type="text/css" href="' + url + '" />');
  			}
  		});
  		return this;
  	}
docs: Load CSS files
  
  @param  Array    to load CSS file URLs
  @return elFinder