Repeater javascritpt checkitem

 

   <asp:Repeater ID="RepeaterProductRelations" runat="server">
                                            <HeaderTemplate>
                                                <table width="100%" cellpadding="0" cellspacing="0">
                                                    <tr>
                                                        <td colspan="3" style="text-decoration: underline;">                                             </td>
                                                    </tr>
                                            </HeaderTemplate>
                                            <ItemTemplate>
                                                <tr>
                                                    <td style="width: 25px; vertical-align: top;">
      
                                                        <asp:CheckBox ID="ckbProductID" runat="server" AutoPostBack="False" onclick=<%# "CheckItemsss(this,'" + DataBinder.Eval(Container.DataItem, "productPrice") +"');"%>
                                                            Visible='<%# Page.User.Identity.IsAuthenticated %>' />
                                                        <asp:HiddenField ID="hidProdcutID" runat="server" Value='<%# Eval("productId") %>' />
                                                    </td>
                                                    <td style="vertical-align: top;">
                                                        <a href="prDetails.aspx?pId=<%# DataBinder.Eval(Container.DataItem, "productId")%>"
                                                            style="text-decoration: none; color: #5e5e5e;">
                                                            <%# DataBinder.Eval(Container.DataItem, "productNumber")%>
                                                        </a>
                                                    </td>
                                                    <td>
                                                        <a href="productDetails.aspx?pId=<%# DataBinder.Eval(Container.DataItem, "productId")%>"
                                                           >
                                                            <%# DataBinder.Eval(Container.DataItem, "productName")%>
                                                        </a>
                                                    </td>
                                                    <td >                                                        <asp:Label ID="LabelProductOutPrince" runat="server" Visible='<%# Page.User.Identity.IsAuthenticated %>'
                                                            Text='<%# DataBinder.Eval(Container.DataItem, "productOutPrice")%>'></asp:Label>
                                                    </td>                                         
                                                </tr>
                                            </ItemTemplate>
                                            <FooterTemplate>
                                                </table>
                                            </FooterTemplate>
                                        </asp:Repeater>

 <div style="text-align: right">
                                            total:<asp:Label ID="lblTotal" ForeColor="#9e3026" runat="server" Visible="false"></asp:Label>
                                            <asp:Button runat="server" ID="btnAddToCart" Text="btnAddToCart" Visible="false" OnClick="btnAddToCart_Click" />
         </div>

Code
 1function CheckItem(spanChk, value)
 2    {
 3       //var teaNum = new Number(value);
 4      // var s1 = eval(value);
 5      //  var s2 = parseInt(value);
 6           var svalue = parseFloat(value);
 7       
 8         // alert(s1);
 9          //    alert(s2);
10           //     alert(s3);
11            
12          if (spanChk.checked==true)
13          { 
14          var lblcartvalue = document.getElementById("<%=lblCartTotal.ClientID%>");
15          lblcartvalue.innerText= parseFloat(lblcartvalue.innerText)+ svalue;
16        // alert(lblcartvalue);
17        //   var totalvalue = svalue+ parseFloat
18          }
19          else
20          {
21             var lblcartvalue = document.getElementById("<%=lblCartTotal.ClientID%>");
22             lblcartvalue.innerText = parseFloat(lblcartvalue.innerText) - svalue;
23          }
24//       
25        }
26    </script>