find which checkbox is unchecked in jquery code example
Example 1: jquery uncheck checkbox
$('#myCheckbox').prop('checked', true); // Checks it
$('#myCheckbox').prop('checked', false); // Unchecks it
Example 2: jquery checkbox unchecked
$("input:radio[name='NAME']:radio[value='VALUE']").attr("checked",true);
$("input:radio[name='NAME']").removeAttr("checked");