Reading the selected value from asp:RadioButtonList using jQuery

Question

I've got code similar to the following...

<p><label>Do you have buffet facilities?</label>
  <asp:RadioButtonList ID="blnBuffetMealFacilities:chk" runat="server">
    <asp:ListItem Text="Yes" Value="1"></asp:ListItem>
    <asp:ListItem Text="No" Value="0"></asp:ListItem>
  </asp:RadioButtonList></p>
<div id="HasBuffet">
  <p><label>What is the capacity for the buffet?</label>
  <asp:RadioButtonList ID="radBuffetCapacity" runat="server">
    <asp:ListItem Text="Suitable for upto 30 guests" value="0 to 30"></asp:ListItem>
    <asp:ListItem Text="Suitable for upto 50 guests" value="30 to 50"></asp:ListItem>
    <asp:ListItem Text="Suitable for upto 75 guests" value="50 to 75"></asp:ListItem>
    <asp:ListItem Text="Suitable for upto 100 guests" value="75 to 100"></asp:ListItem>
    <asp:ListItem Text="Suitable for upto 150 guests" value="100 to 150"></asp:ListItem>
    <asp:ListItem Text="Suitable for upto 250 guests" value="150 to 250"></asp:ListItem>
    <asp:ListItem Text="Suitable for upto 400 guests" value="250 to 400"></asp:ListItem>
  </asp:RadioButtonList></p>
</div>

I want to capture an event when the radio list blBuffetMealFacilities:chk changes client side and perform a slide down function on the HasBuffet div from jQuery. What's the best way to create this, bearing in mind there are several similar sections on the page, where I want questions to be revealed depending on a yes no answer in a radio list.

Answer 1

The simple way to retrieve checked value of RadioButtonList1 is:

$('#RadioButtonList1 input:checked').val()

Edit by Tim:

where RadioButtonList1 must be the ClientID of the RadioButtonList

var rblSelectedValue = $("#<%= RadioButtonList1.ClientID %> input:checked");