如果将以下代码添加到a.panelclick事件处理程序的开头，则超时将生效：

//cache all the `a.panel` elements and setup a timer for our `setTimeout`s
var $panels = $('a.panel'),
    timer   = null;

//add click event handlers to all the `a.panel` links
$panels.click(function () {

    //clear our timer so we don't get redirected back to `#item1` after clicking a link in a timely manor
    clearTimeout(timer);
    timer = null;

    //cache the value of `$(this)` since we will use it more than once
    var $this = $(this);

    //check if we just clicked the link to the second page
    if ($this.attr('href') == '#item2') {

        //set a timer to return to the first page after five seconds of inactivity
        timer = setTimeout(function () {
            $panels.filter('[href="#item1"]').trigger('click');
        }, 5000);

    //check if we just clicked the link to the third page
    } else if ($this.attr('href') == '#item3') {

        //set a timer to return to the first page after three seconds of inactivity
        timer = setTimeout(function () {
            $panels.filter('[href="#item1"]').trigger('click');
        }, 3000);
    }

下面是一个演示：http://jsfiddle.net/jasper/EXfnN/28/