Hello World jQuery Code not working -

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i'm trying system set-up learn jquery , can't seem simple hello world program work , i'm not sure why. seems should work fine.

i'm using ci here controller followed view. thanks.

class java extends controller{      function index(){         $this->load->view('java_view');     }  }

the view file: 

<script type = "javascript" src="http://localhost/ci/js/jquery.js"></script>  <script type="javascript">       $(document).ready(function() {          $("#hi").click(function() {             alert("hello world!");         });     }); </script> 

<a id = "hi" href="">link</a>

works perfectly, proven in example: http://jsfiddle.net/tt5s7/

the error has in linkage jquery.js or in java controller.


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