How to disable/enable an input with jQuery? - Stack Overflow

jQuery 1.6+

To change the disabled property you should use the .prop() function.

$("input").prop('disabled', true);  $("input").prop('disabled', false);

jQuery 1.5 and below

The .prop() function doesn't exist, but .attr() does similar:

Set the disabled attribute.

$("input").attr('disabled','disabled');

To enable again

$("input").removeAttr('disabled');

Read full article from How to disable/enable an input with jQuery? - Stack Overflow