javascript - How to catch if user clicks back button?

Question

I am using this snippet, it works in all actions except if user clicks back button to leave the page.

$(window).bind('hashchange', function () 
{
    $.post("track.php", 
    {
        ip: ip,
        referer: referer,
    });
});

$(window).bind('beforeunload', function () 
{
    $.post("track.php", 
    {
        ip: ip,
        referer: referer,
    });
});

$(window).unload(function () 
{
    $.post("track.php", 
    {
        ip: ip,
        referer: referer,
    });
});

Is it possible to catch if user clicks back button ?

Answer 1

ajax リクエストを同期させます。これは、私が最後にチェックしたオペラでは機能しません。

$.ajax({
    async: false
});