code: function(req, res){
  		    return function(){
  		        var buf = [],
  		            messages = req.flash(),
  		            types = Object.keys(messages),
  		            len = types.length;
  		        if (!len) {
  		           return '';
  	           }
  		        buf.push('<div id="messages">');
  		        for (var i = 0 ; i < len; ++i) {
  		            var type = types[i],
  		                msgs = messages[type], j;
  		            buf.push('  <ul class="' + type + '">');
  		            for (j = 0, len = msgs.length; j < len; ++j) {
  		                var msg = msgs[j];
  		                buf.push('    <li>' + msg + '</li>');
  		            }
  		            buf.push('  </ul>');
  		        }
  		        buf.push('</div>');
  		        return buf.join('\n');
  		    };
  		}
docs: req.flash to html helper