var vibrate = function() {

    var shake= 3;

    $(".actionsMode[mode='on']").stop(true, false)
        .css({
            position: 'relative',
            left: Math.round(Math.random() * shake) - ((shake + 1) / 2) + 'px',
            top: Math.round(Math.random() * shake) - ((shake + 1) / 2) + 'px'
        });
};

var stop_vibrate = function() {
    clearInterval(vibrateIndex);
    $(".actionsMode[mode='on']").stop(true,false)
        .css({position: 'static', left: '0px', top: '0px'});
};