当我更改一个jQuery Datepicker的DOM位置时，它不起作用

Question

I have a button for showing JQuery datepicker (version: 1.8.20).

After running this code:

if (scope===document){
  var a=$("input.datepicker");
  $('#header').append(a);
}

This error appear:

jquery-ui-1.8.20.custom.min.js:65 Uncaught TypeError: Cannot read property 'toLowerCase' of undefined
    at Datepicker._showDatepicker (jquery-ui-1.8.20.custom.min.js:65)
    at jquery-ui-1.8.20.custom.min.js:65
    at Function.each (jquery-1.7.2.min.js:2)
    at init.each (jquery-1.7.2.min.js:2)
    at init.$.fn.datepicker (jquery-ui-1.8.20.custom.min.js:65)
    at showDatePicker (default.js:270)
    at HTMLInputElement.<anonymous> (default.js:249)
    at HTMLInputElement.dispatch (jquery-1.7.2.min.js:3)
    at HTMLInputElement.i (jquery-1.7.2.min.js:3)

Answer 1

Thanks all.

I upgrade the JQuery Version and the problem solved.

I have to upgrade all the code because of the deprecated methods.