Javascript ASP选项卡容器与clientID有关的问题_Javascript_Asp.net_Vb.net_Asp.net Ajax_Tabcontainer

Javascript ASP选项卡容器与clientID有关的问题

javascript asp.net vb.net

Javascript ASP选项卡容器与clientID有关的问题,javascript,asp.net,vb.net,asp.net-ajax,tabcontainer,Javascript,Asp.net,Vb.net,Asp.net Ajax,Tabcontainer,我想在tab为2时隐藏按钮。总是会出错 <script type="text/javascript"> function clientActiveTabChanged(sender, args) { if ((sender.get_activeTabIndex()) == '2') { alert(sender.get_activeTabIndex()); var messageElement = document.getElementById('<%= di

我想在tab为2时隐藏按钮。总是会出错

<script type="text/javascript">

function clientActiveTabChanged(sender, args) {
if ((sender.get_activeTabIndex()) == '2')
{
    alert(sender.get_activeTabIndex());
    var messageElement = document.getElementById('<%= divMessage.clientID%>').value;
    messageElement.style.display = 'block';
}
}
</script>

<body>
<form id="form1" runat="server">
 <asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server" 
    EnableScriptGlobalization="True"></asp:ToolkitScriptManager>

<asp:TabContainer ID="TabContainer1" runat="server" ActiveTabIndex="0"  
            Width="100%" BorderStyle="None" OnClientActiveTabChanged="clientActiveTabChanged"> 

     <asp:TabPanel runat="server"  ID="TabPanel1"> 
      <HeaderTemplate>Test1</HeaderTemplate>
      <ContentTemplate></ContentTemplate>
    </asp:TabPanel>

  <asp:TabPanel runat="server"  ID="TabPanel2"> 
      <HeaderTemplate>Test2</HeaderTemplate>
      <ContentTemplate></ContentTemplate>
    </asp:TabPanel>

  <asp:TabPanel runat="server"  ID="TabPanel3"> 
      <HeaderTemplate>Test3</HeaderTemplate>
      <ContentTemplate></ContentTemplate>
    </asp:TabPanel>

 </asp:TabContainer>
 <div runat="server" id="divMessage" style="display: none;">
 <asp:Button ID="Button1" runat="server" Text="Button" />
</div> 


</form>

</body>
</html>


函数ClientActivateABC已更改（发送方，参数）{
如果（（sender.get_activeTabIndex（））==“2”）
{
警报（sender.get_activeTabIndex（））；
var messageElement=document.getElementById（“”）.value；
messageElement.style.display='block'；
}
}
测试1
测试2
测试3

您正在使用按钮元素上的.value。这将返回按钮的文本，该文本是字符串，没有样式。以下几点应该行得通。此外，您还提到要隐藏它，但将显示设置为“阻止”。应该没有

var messageElement = document.getElementById('<%= divMessage.clientID%>');
messageElement.style.display = 'block';

var messageElement=document.getElementById（“”）；
messageElement.style.display='block'；

“始终获取错误”我缺少错误。[HttpException（0x80004005）：De Controls verzameling kan niet worden gewijzigd omdat het besturingselection code blokken bevat（即）]System.Web.UI.ControlCollection.Add（Control child）+9600651以这种方式：函数clientactivatebchanged（sender，args）{if（（sender.get\u activeTabIndex（））=='2'）{alert（sender.get_activeTabIndex（））；var messageElement=document.getElementById（''）；messageElement.style.display='none'；}}错误：[HttpException（0x80004005）：De Controls-verzameling-kan-niet-worden-gewijzigd-omdat-het-besturingselection-codeboken-bevat（即）]System.Web.UI.ControlCollection.Add（控制子项）+9600651