问Javascript onmouseout睡眠？

EN

function outfunction(event) {
    var that = this; // to be able to use this later.
    window.setTimeout(function() {
        …
    /* you can use 'that' here to refer to the element
       event is also available in this scope */
    }, 3000);
}

var doSomething = function () {
    //Some code will here after 3 seconds of mouseout
};

anElement.onmouseout = function () {
   setTimeout(doSomething, 3000);
};