TextBox1
TotalFeesPaidTextbox
AmountReceivedTextbox
<%@ Page Title="" Language="C#" MasterPageFile="~/Site1.Master" AutoEventWireup="true" CodeBehind="WebForm7.aspx.cs" Inherits="Application.WebForm7" %> <asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server"> <script language="javascript" type="text/javascript"> function sumCalc() { var _txt1 = document.getElementById('<%= TotalFeesPaidTextBox.ClientID %>'); var _txt2 = document.getElementById('<%= AmountReceivedTextbox.ClientID %>'); var _txt3 = document.getElementById('<%= TextBox1.ClientID %>'); var t1 = 0, t2 = 0; if (_txt1.value != "") t1 = _txt1.value; if (_txt2.value != "") t2 = _txt2.value; _txt3.value = parseInt(t1) + parseInt(t2); } </script> <asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server"> <asp:TextBox ID="TotalFeesPaidTextBox" runat="server"> <asp:TextBox ID="AmountReceivedTextbox" runat="server" onkeyup ="sumCalc" AutoPostBack="True"> <asp:TextBox ID="TextBox1" runat="server">
<asp:textbox id="AmountReceivedTextbox" runat="server" onblur="javascript:sumCalc();" xmlns:asp="#unknown"> </asp:textbox>
var
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