Answers for "jquery if checkbox is checked show input"

How to check whether a checkbox is checked in jQuery?

//using plane javascript 
if(document.getElementById('on_or_off_checkbox').checked) {
    //I am checked
} 

//using jQuery
if($('#on_or_off_checkbox').is(':checked')){
    //I am checked
}

How to check checked checkbox in jquery

$('.myCheckbox').prop('checked', true);
$('.myCheckbox').prop('checked', false);