前端 CDN资源
jquery:
http://code.jquery.com/jquery-1.7.2.js
bootstrap:
http://netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css
http://netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap-theme.min.css
http://netdna.bootstrapcdn.com/bootstrap/3.1.1/js/bootstrap.min.js