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调用javascript失败

<head runat="server">
    <title>无标题页 </title>
    <script type="text/javascript">
      function f(form1)
      {
        var v=form1.Button1.value;
        alert(v);
      }
    </script>
</head>
<body>
    <form id="form1" runat="server">
        <asp:TextBox ID="TextBox1" runat="server"> </asp:TextBox>
        <asp:Button ID="Button1" runat="server" Text="Button"  OnClick="f();"/>
    </form>
</body>
</html>
总提示: f()的“)”不对,很郁闷
<asp:Button ID="Button1" runat="server" Text="Button"  OnClientClick="f();"/>

<asp:Button ID="Button1" runat="server" Text="Button"  OnClick="f(this);"/>

function f(btn)
      {
        var v=btn.value;
        alert(v);
      }


f(form1)参数没输入

<asp:Button ID="Button1" r


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