Why is the jquery script not working?

Question

Why is the jQuery script working in my jsfiddle but not in my page?

What I've done: Tried different versions of JQuery...made the script

So I have this test page:

Head Part

   <!-- Scripts -->
        <script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js"></script>
        <script src="//ajax.googleapis.com/ajax/libs/jqueryui/1.10.3/jquery-ui.min.js"></script>
           <style>

            select #canselect_code {
                width:200px;
                height:200px;
            }
            .fr {
                float:right;
            }
            .fl {
                float:left;
            }


        </style>

        <script>
$(document).ready(function(){
            $('[id^=\"btnRight\"]').click(function (e) {
    
    $(this).prev('select').find('option:selected').remove().appendTo('#isselect_code');
    
});

$('[id^=\"btnLeft\"]').click(function (e) {

    $(this).next('select').find('option:selected').remove().appendTo('#canselect_code');

});

});
        </script>
       

</head>

Body Part

 <div>
    <select id='canselect_code' name='canselect_code' multiple class='fl'>
        <option value='1'>toto</option>
        <option value='2'>titi</option>
    </select>
    <input type='button' id='btnRight_code' value='  >  ' />
    <br>
    <input type='button' id='btnLeft_code' value='  <  ' />
    <select id='isselect_code' name='isselect_code' multiple class='fr'>
        <option value='3'>tata</option>
        <option value='4'>tutu</option>
    </select>
</div>

JSFIDDLE HERE

Now my question is: Why is the code working in JsFiddle but not in my document?

Thanks for your answers!

EDIT: Added document ready function..still does not work!

Answer 1

This works fine. just insert your jquery code in document.ready function.

 $(document).ready(function(e) {   
    // your code here
 });

example:

jquery

    $(document).ready(function(e) {   

      $('[id^=\"btnRight\"]').click(function (e) {    
        $(this).prev('select').find('option:selected').remove().appendTo('#isselect_code');    
      });

      $('[id^=\"btnLeft\"]').click(function (e) {
        $(this).next('select').find('option:selected').remove().appendTo('#canselect_code');
      });

    });

html

    <div>
        <select id='canselect_code' name='canselect_code' multiple class='fl'>
            <option value='1'>toto</option>
            <option value='2'>titi</option>
        </select>
        <input type='button' id='btnRight_code' value='  >  ' />
        <br>
        <input type='button' id='btnLeft_code' value='  <  ' />
        <select id='isselect_code' name='isselect_code' multiple class='fr'>
            <option value='3'>tata</option>
            <option value='4'>tutu</option>
        </select>
    </div>