date format jquery datepicker

<!------ date picker ]  -------->
<link rel="stylesheet" href="http://code.jquery.com/ui/1.11.4/themes/smoothness/jquery-ui.css">
<script src="http://code.jquery.com/jquery-1.10.2.js"></script>
<script src="http://code.jquery.com/ui/1.11.4/jquery-ui.js"></script>
<script>
var jq = jQuery.noConflict();

jq(function() {

jq(".datepic").datepicker({

dateFormat: "yy-mm-dd",

yearRange: '1950:2050',

changeMonth: true,

changeYear: true
});

});
</script>
<!------ date picker ]  -------->