jquery计时器每次都获得旧值

Question

我正在使用http://code.cyntaxtech.com/plugins/jquery-timer库（jquery.timer.js）。

$(document).ready(function() {

    var previous_id=$("#rows td").first().text();

    $('#rows').timer({
        delay: 5000,
        repeat: true,
        url: "test.php?id="+previous_id,
        callback: function() {
            // insert a new <td> element with value that must be a 'previous_id' in next timer fire
        }
    });
});

每次我收到旧的previous_id值:(我读过一些文章，并且明白我必须在函数（计时器）中确定变量previous_id。但是我怎么能在上面的代码中做到这一点？

Answer 1

设置变量` after inserting the new td`

callback: function() {
            // insert a new <td> element with value that must be a 'previous_id' in next timer fire
            previous_id=$("#rows td").first().text();
        }