function addshow(obj)
{
var count= parseInt("<%=this.Repeater1.Items.Count%>")
for (var i=0;i<count;i++)
{
document.getElementById('PayPrice'+i).value=obj;
}
}

                        <asp:Repeater ID="Repeater1" runat="server">
                          <ItemTemplate>
                            <tr>
                            <td align="left" background="../IMG/Order_bg_2.gif" ><asp:TextBox ID="PayPrice" runat="server" Width="9px" Text='<%#Convert.ToDouble(Eval("Price").ToString()).ToString("N0")%>'></asp:TextBox></td>
   </tr>
                          </ItemTemplate>
                        </asp:Repeater>
obj的值变动时无法传到Repeater1控件里面的PayPrice.text里面。