Date time picker is not working in java script.

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SharePoint2013

I came up with requirement of adding date time picker on list item in share point.I was using share point designer to add through editor web part.While debugging it shows error like uncaught TypeError: $(...).datepicker is not a function.But I had all the reference as possible but I can't overcome this issue.

What I have tried:





 


$(document).ready(function() {


$( "#todatepicker" ).datepicker();--- while running it shows uncaught TypeError: $(...).datepicker
$( "#todatepicker1" ).datepicker();

} );

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