jquery - Visual Studio MVC wont load some javascript files -

i started new project file > asp.net mvc 4 web application > internet application

the problem have when run project throws error uncaught typeerror: object [object object] has no method 'splitter' know error means plugin file splitter loaded correctly.

i started project in folder without aid of visual studio - same file stucture, same code, works expected.

  <script type="text/javascript" src="http://code.jquery.com/jquery-1.8.0.min.js"></script>     <script type="text/javascript" src="splitter.js"></script>     <script type="text/javascript">         $(function () {              $(".panel").splitter();          });       </script> 

am missing something?

if error in visual studio, need add splitter.js file _references.js file. how vs knows js files check.

what _references.js used for?