Strange Issue with jQuery DatePicker

Strange Issue with jQuery DatePicker

Hello, 
I have an application that uses jQuery " jQuery JavaScript Library v1.10.2".
We have some pages with fields that have datepicker added:
//Some code
$("#fecInclusionDate").datepicker($.datepicker.regional["ca"]);
$("#fecInclusionDate" ).datepicker( "option", "dateFormat", 'dd/mm/yy' );

We notice that if user navgates to some forms that have this component enabled, but did not use component, then in next page, we have like a Datepicker shadow on the top left of screen:
 
This occurs with multi-browse, We don't have any js error on page.

Any clue that I can follow to solve this?

Thank.
Pedro