How to use compare validator with a set of different values?

Q:

I have a gridview contains a textbox as a template field :

the aspx:

 <asp:GridView Width="100%" ID="gv_Evaluation" CssClass="datatable" AllowSorting="True"
 runat="server" AutoGenerateColumns="False" AllowPaging="True" GridLines="None"
 OnRowDataBound="gv_Evaluation_RowDataBound"&g开发者_如何学运维t;
  <Columns>
   <asp:TemplateField HeaderText="serial">
       <ItemTemplate>
         <asp:Label ID="lblSerial" runat="server"></asp:Label>
       </ItemTemplate>
   </asp:TemplateField>
   <asp:BoundField HeaderText="activity type" DataField="activityType" />
   <asp:BoundField HeaderText="weight" DataField="activityWeight" />
   <asp:TemplateField HeaderText="evaluation">
      <ItemTemplate>
       <telerik:RadTextBox ID="txt_evaluateWeights" runat="server" AutoPostBack="True"
        OnTextChanged="txt_evaluateWeights_TextChanged"></telerik:RadTextBox>
       <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="txt_evaluateWeights" Display="Dynamic" ErrorMessage="*" SetFocusOnError="True"></asp:RequiredFieldValidator>
     </ItemTemplate>
   </asp:TemplateField>
  </Columns>
 <RowStyle VerticalAlign="Top" CssClass="row" />
 </asp:GridView>

the weight column contains the following numbers[50,10,10,10,5,5,10]

What I wanna to do is:

Validate the data entry when the user enters the data in the txt_evaluateWeights Where it must be less than or equal the meeting one in the weight column. I do that in server side. But I wanna to do that client side. I tried to use the compare validator but it doesn't suit my case because each time i compare with a different value, according to the weight column.

You can use the CustomValidator class and set the ClientValidationFunction property to use clientside validation

see MSDN documentation