jQuery Price Format plugin does not work with UpdatePanel in ASP.Net

hi

I used below code for price format

          <script type="text/javascript">
              $(function () {
                  $('#txtprice1').priceFormat({
                      prefix: '',
                      thousandsSeparator: ',',
                      centsSeparator: ',',
                      limit: 10,
                      centsLimit: 0
                  });
              });
        </script>

and below is textbox code:

      <asp:TextBox ID="txtprice1" runat="server" CssClass="txtpriceS">
                  </asp:TextBox>

it worked correctly and show thousand seprator in textbox:100,000

but now I should put textbox in updatepanel:

 <asp:UpdatePanel ID="UpdatePanel2" runat="server">
                                  <ContentTemplate>
                  <asp:TextBox ID="txtprice1" runat="server" CssClass="txtpriceS">
                  </asp:TextBox>
                               </ContentTemplate>
                </asp:UpdatePanel>

when I put it in update panel price format doesn't work I mean when I type number in textbox it show number in simple format(10000) ...

why this happen?

Best Regards

Neda