Introduction
Here I will explain how to validate user registration form in JavaScript with source code or JavaScript user registration form validation.
To implement this we need to write the code as shown below
<%@ Page
Language="C#"
AutoEventWireup="true"
CodeFile="Default.aspx.cs"
Inherits="_Default"
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD
XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>Registration Form Validation in JavaScript Source Code</title>
<script language="javascript" type="text/javascript">
function validate() {
var summary = "";
summary += isvaliduser();
summary += isvalidFirstname();
summary += isvalidLocation();
if (summary != "")
{
alert(summary);
return false;
}
else {
return true;
}
}
function isvaliduser() {
var uid;
var temp = document.getElementById("<%=txtuser.ClientID
%>");
uid =
temp.value;
if (uid == "")
{
return ("Please Enter
UserName" + "\n");
}
else {
return "";
}
}
function isvalidFirstname() {
var uid;
var temp = document.getElementById("<%=txtfname.ClientID
%>");
uid =
temp.value;
if (uid == "")
{
return ("Please enter
firstname" + "\n");
}
else {
return "";
}
}
function isvalidLocation() {
var uid;
var temp = document.getElementById("<%=txtlocation.ClientID
%>");
uid =
temp.value;
if (uid == "")
{
return ("Please enter
Location" + "\n");
}
else {
return
"";
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<table align="center">
<tr>
<td>UserName</td>
<td><asp:TextBox ID="txtuser" runat="server" /></td>
</tr>
<tr>
<td>First Name</td>
<td><asp:TextBox ID="txtfname" runat="server" /></td>
</tr>
<tr>
<td>Location</td>
<td><asp:TextBox ID="txtlocation" runat="server" /></td>
</tr>
<tr>
<td></td>
<td>
<asp:Button ID="btnsubmit" runat="server" Text="Save"
OnClientClick ="javascript:validate()"
/>
</td>
</tr>
</table>
</form>
</body>
</html>
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