Uncaught TypeError datepicker is not a function anonymous function

Question

I want to work on my date picker java script but I am getting the error.

1:27 Uncaught TypeError: $(...).datepicker is not a function(anonymous function) @ 1:27fire @ jquery-1.9.1.js:1037self.fireWith @ jquery-1.9.1.js:1148jQuery.extend.ready @ jquery-1.9.1.js:433completed @ jquery-1.9.1.js:103 jquery-2.1.0.min.js:4 XHR finished loading: POST "https://localhost:26143/skypectoc/v1/pnr/parse".l.cors.a.crossDomain.send @ jquery-2.1.0.min.js:4o.extend.ajax @ jquery-2.1.0.min.js:4PNR.findNumbers @ pnr.js:43parseContent @ contentscript.js:385processMutatedElements @ contentscript.js:322

My script :

<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />

<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
<script src="http://code.jquery.com/ui/1.11.0/jquery-ui.js"></script>

<script type="text/javascript">
    $(document).ready(function() {
        $('.dateinput').datepicker({ format: "yyyy/mm/dd" });
    }); 
</script>

<!-- Bootstrap core JavaScript
================================================== -->

<!-- Placed at the end of the document so the pages load faster -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>

<script>window.jQuery || document.write('<script src="../../assets/js/vendor/jquery.min.js"><\/script>')</script>
<script src="http://getbootstrap.com/dist/js/bootstrap.min.js"></script>
<!-- Just to make our placeholder images work. Don't actually copy the next line! -->
<script src="http://getbootstrap.com/assets/js/vendor/holder.min.js"></script>
<!-- IE10 viewport hack for Surface/desktop Windows 8 bug -->
<script src="http://getbootstrap.com/assets/js/ie10-viewport-bug-workaround.js"></script>
<script type="text/javascript">
    $(document).ready(function() {
        $("#extra-content").hide();
        $("#toggle-content").click(function(){
            $("#extra-content").toggle();
        });
    });
</script>            

Any feedback will be appreciated.