Only one checkbox checked at a time in javascript

Question

I have 3 checkbox, for which I want only 1 checkbox to be checked at a time. below is my fiddle for the html

JS fiddle

I want this to b

Answer 1

How about this - fiddle:

$('input.chk').on('change', function() {
    $('input.chk').not(this).prop('checked', false);  
});

Edit: for second part of your question to un-check other checkboxes when selecting parent checkbox see this fiddle - (as per chat) :

if (!cb.checked) { 
$('#trchkOptions input[type=checkbox]').attr('checked', false); 
}