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Formvalidation.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<html>
<head>
<script>
function validateForm() {
var name = document.forms["myForm"]["name"].value;
var email = document.forms["myForm"]["email"].value;
var password = document.forms["myForm"]["password"].value;
var password2 = document.forms["myForm"]["password2"].value;
// Reset error messages
document.getElementById("nameError").innerHTML = "";
document.getElementById("emailError").innerHTML = "";
document.getElementById("passwordError").innerHTML = "";
document.getElementById("password2Error").innerHTML = "";
// Validate name
if (name == "") {
document.getElementById("nameError").innerHTML = "Name must be filled out";
return false;
}
// Validate email
if (email == "") {
document.getElementById("emailError").innerHTML = "Email must be filled out";
return false;
}
// Validate password
if (password == "") {
document.getElementById("passwordError").innerHTML = "Password must be filled out";
return false;
}
// Validate password match
if (password != password2) {
document.getElementById("password2Error").innerHTML = "Passwords do not match";
return false;
}
return true;
}
</script>
</head>
<body>
<form name="myForm" action="/action_page.php" onsubmit="return validateForm()" method="post">
Name: <input type="text" name="name"><br>
<span id="nameError" style="color:red"></span><br><br>
Email: <input type="email" name="email"><br>
<span id="emailError" style="color:red"></span><br><br>
Password: <input type="password" name="password"><br>
<span id="passwordError" style="color:red"></span><br><br>
Confirm Password: <input type="password" name="password2"><br>
<span id="password2Error" style="color:red"></span><br><br>
<input type="submit" value="Submit">
</form>
</body>
</html>
</body>
</html>