JavaScript 错误：“window.top.document.getElementById(...)”为 null 或不是对象
当我尝试单击日历控件时，出现 JavaScript 错误。
html 代码是：
<td align="left" style="width:50%;"><asp:Label runat="server" CssClass="TextFontBold" ID="lblStartDate" Text="Start Date:"></asp:Label>
<input type="text" class="TextBox" id="FromDate" runat="server"/><a href="javascript:ShowCalendar('FromDate1')"><img src="images/Calendar.png" border="0" /></a>
<iframe src="Calendar.aspx?DateTextID=FromDate" style="display:none; top: 0px; left: 0px; width:245px; height:164px" frameborder="0" scrolling="no" name="FromDate1" id="FromDate1"></iframe>
<asp:Label runat="server" CssClass="TextFontBold" ID="lblPromoStartTime" Text="Start Time:"></asp:Label>
</td>
当我单击日历控件中的日期时，会在代码隐藏中执行此代码：
Protected Sub Calendar1_SelectionChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles Calendar1.SelectionChanged
Dim strjscript As String = "<script language=""javascript"" type=""text/javascript"">"
strjscript &= "window.top.document.getElementById('" & HttpContext.Current.Request.QueryString("DateTextID") & "').value = '" & Calendar1.SelectedDate & "';"
strjscript &= "window.top.document.getElementById('" & HttpContext.Current.Request.QueryString("DateTextID") & "1').style.display = 'none';"
strjscript = strjscript & "</script" & ">"
Literal1.Text = strjscript
End Sub
我收到的错误是 'window.top.document.getElementById (...)' 为 null 或不是对象
我确实有一个名为 FromDate 的对象。
还有什么可能导致此错误？
I am getting a javascript error when I attempt to click on my calendar control.
The html code is:
<td align="left" style="width:50%;"><asp:Label runat="server" CssClass="TextFontBold" ID="lblStartDate" Text="Start Date:"></asp:Label>
<input type="text" class="TextBox" id="FromDate" runat="server"/><a href="javascript:ShowCalendar('FromDate1')"><img src="images/Calendar.png" border="0" /></a>
<iframe src="Calendar.aspx?DateTextID=FromDate" style="display:none; top: 0px; left: 0px; width:245px; height:164px" frameborder="0" scrolling="no" name="FromDate1" id="FromDate1"></iframe>
<asp:Label runat="server" CssClass="TextFontBold" ID="lblPromoStartTime" Text="Start Time:"></asp:Label>
</td>
When I click on a date in the calendar control, this code is executed on the code-behind:
Protected Sub Calendar1_SelectionChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles Calendar1.SelectionChanged
Dim strjscript As String = "<script language=""javascript"" type=""text/javascript"">"
strjscript &= "window.top.document.getElementById('" & HttpContext.Current.Request.QueryString("DateTextID") & "').value = '" & Calendar1.SelectedDate & "';"
strjscript &= "window.top.document.getElementById('" & HttpContext.Current.Request.QueryString("DateTextID") & "1').style.display = 'none';"
strjscript = strjscript & "</script" & ">"
Literal1.Text = strjscript
End Sub
The error I am getting is 'window.top.document.getElementById(...)' is null or not an object
I do have an object called FromDate.
What else could be causing this error?
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评论（2）
尝试用
window.parent.document.getElementById()而不是window.top.document.getElementById()Try
window.parent.document.getElementById()instead ofwindow.top.document.getElementById()您是否尝试过
parent.document.getElementById(...)？只是一个想法...按照 pimvdb 的建议进行编辑
Have you tried
parent.document.getElementById(...)? Just an idea...Edited as suggested by pimvdb