Question

I have a <div class="answer" id="yesOptions"> and I need to check that at least 1 checkbox inside this particular is checked. If not, I need to return alert('At least 1 checkbox must be checked from this div!');

How can I do this?

Answer 1

How about

var checkedboxes = $('#yesOptions :checkbox:checked').length;

if (checkedboxes === 0){
    alert('At least 1 checkbox must be checked from this div!');
}

Demo at http://jsfiddle.net/f8UhA/