Jquery: check if checkbox is checked

In Jquery it is very easy to find if a checkbox is checked or not.

Example:


if($('#mycheckbox').is(':checked')){
//do something
}else{
//do otherwise
}


Jquey: count all checked checkbox

In Jquery it's very easy to find all checkboxes that are checked. We can use filter() method of Jquery.

eq.

var $allcheckbox = $('input[type=checkbox]');
alert($allcheckbox.filter(':checked').length);