Datepicker not open


i have an site with Bootstrap.

and i have this:

         <div class='col-sm-3'>
               <div class='input-group date' id='PassaportValidation'>
                 <asp:textbox ID="Textbox6" runat="server" class="form-control datepicker"/>
                      <span class="input-group-addon">
                      <span class="glyphicon glyphicon-calendar"></span>

<script type="text/javascript">
     $(function () {

And when i click on the icon or textbox the datepicker wont open.

where is my error?

Thank’s in advance

did you link in jQuery library & UI ?

<link rel="stylesheet" href="">
<script src=""></script>