问jQuery: 2秒后在我的网站上显示div，但每次刷新页面或输入不同的页面时只显示一次，而不是每次都显示一次。

EN

if (!localStorage.getItem("shown-popup")) {
    // We haven't shown it yet
    setTimeout(function() {
        // ----show the div here ----

        // Flag we've shown it (you might do this only when they click the [x])
        localStorage.setItem("shown-popup", "yes");
    }, 2000);
}

var needToShowPopup = true;
try {
    needToShowPopup = !localStorage.getItem("shown-popup");
} catch (e) {
}
if (needToShowPopup) {
    // We haven't shown it yet
    setTimeout(function() {
        // ----show the div here ----

        // Flag we've shown it (you might do this only when they click the [x])
        try {
            localStorage.setItem("shown-popup", "yes");
        } catch (e) {
        }
    }, 2000);
}