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HTML code:
<ItemTemplate>
<asp:HiddenField ID="HiddenField1" runat="server" Value='<%# Eval("userName") %>' />
<asp:Button ID="Button1" runat="server" Text="Button" />
</ItemTemplate>


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ǰ̨Button¼ÓOnClientClick,ÈçÏÂ:
<asp:Button ID="Button1" runat="server" Text="Button" OnClientClick="return test()" />

js:
  <script type="text/javascript">
  function test() {
  var a = document.getElementById("HiddenField1").value;
  alert(a);//Õâ¾ÍÊÇÄãÒªµÄ
  return false;
  }
  </script>

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ǰ̨Button¼ÓOnClientClick,ÈçÏÂ:
<asp:Button ID="Button1" runat="server" Text="Button" OnClientClick="return test()" />

js:
<script type="text/javascript">
function test() {
var a = document.ge¡­¡­

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