handlebar helpers for express

app.js

//handlebarjs
var hbs = require('express3-handlebars').create({
	helpers: {
		img: function(name,alt) { return '<img src="images/'+name+'" alt="'+alt+'">';},
		styles: function() {
			//get directory name
			var fs = require('fs');
			var files;
			/* make the array which will be used for css files*/
			files= fs.readdirSync(__dirname+'/public/stylesheets');
			//make the string result
			var result='';			
			for (var i = files.length - 1; i >= 0; i--) {
				var file = files[i];
				var tab = file.split('.');
				if (tab[tab.length-1]=='css')
					result+='<link rel="stylesheet" href="stylesheets/'+file+'">';
			}
			return result;
		},
		css: function(name) {
			return '<link rel="stylesheet" href="stylesheets/'+name+'.css">';
		},
		js: function(name) {
			return '<script src="javascripts/'+name+'.js" type="text/javascript"></script>';
		}
	}
});
app.engine('handlebars', hbs.engine);