当代码存在时，JScript 函数返回 null

Question

我有一个 asp.net c# 网站，但在执行 jscript 时遇到问题。 我有一个加载包含 javascript 和代码的母版页。代码摘录如下。当它运行时，计时器永远不会出现。如果我单击关闭页面按钮，我会收到一条错误消息：

Microsoft JScript 运行时错误：属性“closePage”的值为 null 或未定义，而不是 Function 对象。

上线：

<input type="submit" name="ctl00$CloseSection$btnClose" value="Close Page Now" onclick="closePage(); return false;" id="ctl00_CloseSection_btnClose" class="buttons" />

我尝试了很多方法，将 .js src 行移动到 var 部分的上方和下方。似乎没有什么可以改变这一点。奇怪的是，这在几天前还运行良好。我注意到 MS 在 9/14 进行了几次 VS 更新。

任何帮助将不胜感激。

我可以查看源代码，js 行显示正常：

 <script src="jscripts/StoreFrontClose.js" type="text/javascript"></script>

原文摘录如下：

---

<asp:ContentPlaceHolder ID="CloseSection" runat="server">
 <script src="jscripts/PageClose.js" type="text/javascript"></script>

<script type="text/javascript" language="javascript">
  var timeoutMins = 0;
  var timeoutSecs = 30;
alert("getting ready to start timer");
if (source == "kiosk") {
  startPageCloseTimer();
}              
<div style="text-align: center;">
 The Page will close in: <span id="theTime" class="timeClass"></span>
    <br />
  <asp:Button ID="btnClose" CssClass="buttons" runat="server" OnClientClick="closePage();"
                        Text="Close Page Now" />
 <asp:Button ID="btnKeepOpen" CssClass="buttons" runat="server" OnClientClick="resetTimer();"
                        Text="Keep Page Open a little Longer" />
</div>
</asp:ContentPlaceHolder>

---

PageClose.js 有：

    function startPageCloseTimer() {
    alertTimerId = setTimeout("AlertUser()", timeoutMilli);
    countDown();
}

function AlertUser() {
    extend = false;
    handleTimerId = setTimeout("HandleTimeout();", maxPopupTime);
    jQuery("#messagePopup").dialog("open");
}

function HandleTimeout() {
    if (!extend) {
        closePage();
    }
}

function KeepSessionAlive() {
    extend = true;
    resetTimer();
}



function resetTimer() {

    clearTimeout(alertTimerId);
    clearTimeout(handleTimerId);
    alertTimerId = setTimeout("AlertUser()", timeoutMilli);
    sec = timeoutSecs;
    min = timeoutMins;
    countDown();
}

function closePage() {
alert("getting ready to close page");
clearTimeout(handleTimerId);
clearTimeout(alertTimerId);
clearTimeout(countDownTimerId);
}

var sec = timeoutSecs; //   set the seconds
var min = timeoutMins; // set the minutes

function countDown() {
    sec--;
    if (sec == -01) {
        sec = 59;
        min = min - 1;
    } else {
        min = min;
    }
    if (sec <= 9) { sec = "0" + sec; }
    var time = "";
    if (min > 0) {
        time = (min <= 9 ? "0" + min : min) + " min and ";
    }

    time = time + sec + " sec ";

    if (document.getElementById("theTime")) {
        document.getElementById("theTime").innerHTML = time;
    }
    countDownTimerId = window.setTimeout("countDown();", 1000);
    if (min == '00' && sec == '00') {
        sec = "00";
        window.clearTimeout(countDownTimerId);
    }
}

Answer 1

你只是忘记了结束</script>标签：

<script src="jscripts/PageClose.js" type="text/javascript"></script>

<script type="text/javascript" language="javascript">
    var timeoutMins = 0;
    var timeoutSecs = 30;
    alert("getting ready to start timer");
    if (source == "kiosk") {
        startPageCloseTimer();
    } // end of script
</script> // close tag