Stackoverflow Response: how can I set limit to checkbox selection using radio button values

http://stackoverflow.com/questions/16156088/how-can-i-set-limit-to-checkbox-selection-using-radio-button-values/16156544#16156544

HTML

<div id="checkboxes">
    <input type="checkbox" name="checkboxes" value ="1"/>1<br />
    <input type="checkbox" name="checkboxes" value ="2"/>2<br />
    <input type="checkbox" name="checkboxes" value ="3"/>3<br />
    <input type="checkbox" name="checkboxes" value ="4"/>4<br />
    <input type="checkbox" name="checkboxes" value ="5"/>5<br />
    <input type="checkbox" name="checkboxes" value ="6"/>6<br />
    <input type="checkbox" name="checkboxes" value ="7"/>7<br />
    <input type="checkbox" name="checkboxes" value ="8"/>8<br />
    <input type="checkbox" name="checkboxes" value ="9"/>9<br />
    <input type="checkbox" name="checkboxes" value ="10"/>10<br />
    <input type="checkbox" name="checkboxes" value ="11"/>11<br />
    <input type="checkbox" name="checkboxes" value ="12"/>12<br />
    <input type="checkbox" name="checkboxes" value ="13"/>13<br />
    <input type="checkbox" name="checkboxes" value ="14"/>14<br />
    <input type="checkbox" name="checkboxes" value ="15"/>15<br />
    <input type="checkbox" name="checkboxes" value ="16"/>16<br />
    <input type="checkbox" name="checkboxes" value ="17"/>17<br />
    <input type="checkbox" name="checkboxes" value ="18"/>18<br />
    <input type="checkbox" name="checkboxes" value ="19"/>19<br />
    <input type="checkbox" name="checkboxes" value ="20"/>20<br />
</div>

JavaScript

$('input[name=checkboxes]').on('click', function () {
        var lastOneChecked = $('input[name=checkboxes]:last:checked').length,
            iLimit = lastOneChecked ? 4 : 4,
            iChecked = $('input[name=checkboxes]:checked').length;
    
        if (iChecked > iLimit) {
           return false;
        }
        
        return true; // added so that anonymous function always returns something
    });