Trip advisor script not execute on post back

i want to display the trip advisor rating on my website. all is working fine when all the Control is outside the update panel but when i add Update panel problem arise . take the following example by default when the page load the all is well. but when i click button IN javascript code trip advisor script not execute please help
<asp:Button ID="Button1" runat="server" Text="out" OnClick="Button1_Click" /> <asp:UpdatePanel ID="UpdatePanel1" runat="server"> <ContentTemplate> <table border="1"> <tr> <td> <asp:Button ID="Button2" runat="server" Text="in" OnClick="Button2_Click" /> </td> </tr> <tr> <td> <div id="TA_cdsrat ...