How do i disable a submit button when checkbox is uncheck?

Question

I have something here that cannot seem to help me disable the submit button. any ideas?

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Answer 1

Before jQuery 1.6 attr was OK, after 1.6 you must use prop.

$('#checky').click(function(){
  $('#postme').prop('checked', !$(this).checked);
})

Attributes and properties are different things, but unfortunately jQuery took a long time to differentiate between them.

See also: .prop() vs .attr()