刚刚在用Coolite写程序时，用js显示Windows控件没有问题，只是用Ajax方式无法显示Window控件。我将所有与Window控件相关控件属性都核对并测试，并没有发现什么问题，但在源码模式下有错误。我的Window控件的源码如下：
代码 <ext:Window ID="WindowEmployeeDetails" runat="server" Icon="Group" Title="Employee Details"
Width="400" Height="400" Modal="true" ShowOnLoad="false">
<Body>
<ext:FitLayout ID="FitLayout1" runat="server">
<ext:TabPanel ID="TabPanel1" runat="server" ActiveTabIndex="0" Border="false" DeferredRender="false">
<tabs>
<ext:Tab runat="server" ID="tabUserInfo" Title="User Info" Icon="Group" BodyStyle="padding:5px;">
<Body>
<ext:FormLayout ID="FormLayout1" runat="server">
<ext:Anchor>
<ext:TextField ID="txbUid" runat="server" FieldLabel="uid" Width="250" Disabled="true" />
</ext:Anchor>
<ext:Anchor>
<ext:TextField ID="txbUName" runat="server" FieldLabel="uname" Width="250" />
</ext:Anchor>
</ext:FormLayout>
</Body>
</ext:Tab>
</tabs>
</ext:TabPanel>
</ext:FitLayout>
</Body>
</ext:Window>
Width="400" Height="400" Modal="true" ShowOnLoad="false">
<Body>
<ext:FitLayout ID="FitLayout1" runat="server">
<ext:TabPanel ID="TabPanel1" runat="server" ActiveTabIndex="0" Border="false" DeferredRender="false">
<tabs>
<ext:Tab runat="server" ID="tabUserInfo" Title="User Info" Icon="Group" BodyStyle="padding:5px;">
<Body>
<ext:FormLayout ID="FormLayout1" runat="server">
<ext:Anchor>
<ext:TextField ID="txbUid" runat="server" FieldLabel="uid" Width="250" Disabled="true" />
</ext:Anchor>
<ext:Anchor>
<ext:TextField ID="txbUName" runat="server" FieldLabel="uname" Width="250" />
</ext:Anchor>
</ext:FormLayout>
</Body>
</ext:Tab>
</tabs>
</ext:TabPanel>
</ext:FitLayout>
</Body>
</ext:Window>
上边代码中用下划线标示的部分会提示：“不是已知元素。原因可能是网站中存在编译错误。”。考虑了一下，估计是此错误引起的。 将上边代码去掉FitLayout，问题解决。修改后的代码如下：
代码 <ext:Window ID="WindowEmployeeDetails" runat="server" Icon="Group" Title="Employee Details"
Width="400" Height="400" Modal="true" ShowOnLoad="false">
<Body>
<ext:TabPanel ID="TabPanel1" runat="server" ActiveTabIndex="0" Border="false" DeferredRender="false">
<Tabs>
<ext:Tab runat="server" ID="tabUserInfo" Title="User Info" Icon="Group" BodyStyle="padding:5px;">
<Body>
<ext:FormLayout ID="FormLayout1" runat="server">
<ext:Anchor>
<ext:TextField ID="txbUid" runat="server" FieldLabel="uname" Width="250" />
</ext:Anchor>
<ext:Anchor>
<ext:TextField ID="txbUName" runat="server" FieldLabel="uname" Width="250" />
</ext:Anchor>
</ext:FormLayout>
</Body>
</ext:Tab>
</Tabs>
</ext:TabPanel>
</Body>
</ext:Window>
Width="400" Height="400" Modal="true" ShowOnLoad="false">
<Body>
<ext:TabPanel ID="TabPanel1" runat="server" ActiveTabIndex="0" Border="false" DeferredRender="false">
<Tabs>
<ext:Tab runat="server" ID="tabUserInfo" Title="User Info" Icon="Group" BodyStyle="padding:5px;">
<Body>
<ext:FormLayout ID="FormLayout1" runat="server">
<ext:Anchor>
<ext:TextField ID="txbUid" runat="server" FieldLabel="uname" Width="250" />
</ext:Anchor>
<ext:Anchor>
<ext:TextField ID="txbUName" runat="server" FieldLabel="uname" Width="250" />
</ext:Anchor>
</ext:FormLayout>
</Body>
</ext:Tab>
</Tabs>
</ext:TabPanel>
</Body>
</ext:Window>