Question

如何判断radiobuttonlist是否选中一项

Answer 1

<asp:RadioButtonList runat="server" ID="rdoDiscount" RepeatLayout="Flow" RepeatDirection="Horizontal">
<asp:ListItem Value="1">折扣 </asp:ListItem>
<asp:ListItem Value="2">价格 </asp:ListItem>
</asp:RadioButtonList>
<input type="button" onclick="haveChecked()?alert('已选择'):alert('未选择');" value="check" />

<script type="text/javascript">
function haveChecked()
{
var rbl=document.getElementById('<%=rdoDiscount.ClientID %>');
var rbls=rbl.getElementsByTagName('input');
for(var i=0;i<rbls.length;i++)
{
if(rbls[i].type=='radio')
if(rbls[i].checked) return true;
}
return false;
}

</script>