JS click does not trigger beforeunload in FF

by magicaj

HTML

<form>
    <ul>
        <li><input id="text" type="text"></input></li>        
        <li><input id="submit" type="submit"></input></li>
    </ul>
</form>

JavaScript

$(window).bind("beforeunload", function(event) {
    return "you sure";
});

$("#text").blur(function() {
    $("#submit").click();
});