JS如何获取RadiobuttonList的选中值

<script language="javascript" type="text/javascript">

function RadioButtonList1Changed() {

var vRbtid = document.getElementById("RadioButtonList1");

//得到所有radio

var vRbtidList = vRbtid.getElementsByTagName("INPUT");

for (var i = 0; i < vRbtidList.length; i++) {

if (vRbtidList[i].checked) {

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

var value = vRbtidList[i].value;

alert("选中项的text值为" + text + ",value值为" + value);

}

}

}

</script>

HTML:

<asp:RadioButtonList ID="RadioButtonList1" runat="server" onClick="return RadioButtonList1Changed()">

<asp:ListItem>1</asp:ListItem>

<asp:ListItem>2</asp:ListItem>

<asp:ListItem>3</asp:ListItem>

</asp:RadioButtonList>