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js擷取radiobuttonlist值

 <head id="Head1" runat="server">

    <title></title>

    <script type="text/javascript">

function GetRblSeletedValue(obj)

{

 var rbltable =$(obj);

 var rbs= rbltable.getElementsByTagName("INPUT");

  for(var i = 0;i<rbs.length;i++)

 {

    if(rbs[i].checked)

{

    var text =rbltable.cells[i].innerText;

     var value=rbs[i].value;

    alert("選中項的text值為"+text+",value值為"+value);

 }

 }

}

  function $(id)

{

  return document.getElementById(id);

}

    </script>

</head>

<body>

    <form id="form1" runat="server">

    <div>

        <asp:RadioButtonList ID="radio" runat="server">

            <asp:ListItem Value="1">admin</asp:ListItem>

            <asp:ListItem Value="2">administrator</asp:ListItem>

        </asp:RadioButtonList>

        <input type="button" value="選擇" οnclick="GetRblSeletedValue('radio')" />

    </div>

    </form>

</body>

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