Check if checkbox is checked with jQuery

How can I check if a checkbox in a checkbox array is checked using the id of the checkbox array?

I am using the following code, but it always returns the count of checked checkboxes regardless of id.

function isCheckedById(id) {
    var checked = $("input[@id=" + id + "]:checked").length;

    if (checked == 0) {
        return false;
    } else {
        return true;


$('#' + id).is(":checked")

That gets if the checkbox is checked.

For an array of checkboxes with the same name you can get the list of checked ones by:

var $boxes = $('input[name=thename]:checked');

Then to loop through them and see what’s checked you can do:

    // Do stuff here with this

To find how many are checked you can do:


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