how to call a function when checkbox is checked in jquery code example

Example 1: jquery set checkbox checked

//jQuery 1.6+ use
$('.checkbox').prop('checked', true);
//jQuery 1.5.x and below use
$('.checkbox').attr('checked', true);

Example 2: checkbox is checked jquery

$(your_checkbox).is(':checked');

Example 3: checkbox jquery checked

var isExpanded = $(this).attr('checked') == "checked";