How do you check or uncheck a checkbox input or radio button?

Answer

There are two ways to check or uncheck a checkbox or radio button.

Set the 'checked' attribute to true or false.

 // Check #pcds
 $('#pcds').attr('checked', true);
 // Uncheck #pcds
 $('#pcds').attr('checked', false);

Add or remove the 'checked' attribute:

 // Check #pcds
 $("#pcds").attr('checked', 'checked');
 // Uncheck #pcds
 $("#pcds").removeAttr('checked');