jqeury checkbox set unchecked code example
Example 1: jquery set checkbox checked unchecked
//jQuery 1.6+ use
$('.checkbox').prop('checked', true); //false for uncheck
//jQuery 1.5.x and below use
$('.checkbox').attr('checked', true); //false for uncheck
Example 2: get unchecked checkbox jquery
if ($("#check_box_id").is(':checked')) {
alert("checked");
}else{
alert("unchecked");
}