我在使javascript代码在AJAX加载的div内运行时遇到问题，我试图包含jquery选项卡，但它不起作用，ajax仅输出文本，无法识别javascript。你能帮忙的话，我会很高兴。

这是我的js代码：

var OpenedPage;

function load(url, target) {
    document.getElementById(target).innerHTML = 'Loading ...';
    if (window.XMLHttpRequest) {
        req = new XMLHttpRequest();
    } else if (window.ActiveXObject) {
        req = new ActiveXObject("Microsoft.XMLHTTP");
    }
    if (req != undefined) {
        req.onreadystatechange = function () {
            loadDone(url, target);
        };
        req.open("GET", url, true);
        req.send("");
    }
}

function loadDone(url, target) {
    if (req.readyState == 4) { // only if req is "loaded"
        if (req.status == 200) { // only if "OK"
            document.getElementById(target).innerHTML = "loaded" + req.responseText;
        } else {
            document.getElementById(target).innerHTML = "Error:\n" + req.status + "\n" + req.statusText;
        }
    }
}

function unload() {
    if (OpenedPage == "divsignin") {
        unloaddivsignin();
    }
    if (OpenedPage == "divHowto") {
        unloaddivHowto();
    }

}

function ShowHidedivsignin() {
    unload();
    OpenedPage = "divsignin";
    load("../slogin.php", "divsignin");
    $("#divsignin").animate({"height": "toggle"}, {duration: 800});
}

function unloaddivsignin() {
    OpenedPage = "";
    $("#divsignin").animate({"height": "toggle"}, {duration: 800});
}

function ShowHidedivHowto() {
    unload();
    OpenedPage = "divHowto";
    load("../howto.php", "divHowto");
    $("#divHowto").animate({"height": "toggle"}, {duration: 800});
}

function unloaddivHowto() {
    OpenedPage = "";
    $("#divHowto").animate({"height": "toggle"}, {duration: 800});
}

和HTML：

<div id="divsignin" style="display:none;width:auto"> </div>


<a onClick="ShowHidedivHowto(); return false;" href="#">help</a>