Appendix JS_N_A2

Requirement: Changes of context are only initiated by user request or with user control.

Details: Use an actuation event, rather than focus or load event, to programmatically open links or trigger popup windows.

<form action="http://www.google.com/search" method="get">
    <fieldset>
        <p>
            <label for="demo">Search for:</label>
            <input id="demo" name="q" type="text" />
        </p>
    </fieldset>
</form>

document.getElementById('demo').addEventListener('focus', function(e)
{
    window.open('http://www.some-random-ad.com');
 
}, false);