html+js/alumniValidation.html

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Alumni Form</title>
    <style>
        form {
            width: 300px;
            margin: 20px auto;
            padding: 15px;
            border: 1px solid #ccc;
            border-radius: 8px;
        }

        input {
            width: 100%;
            margin: 10px 0;
            padding: 8px;
        }

        .error {
            color: red;
            font-size: 12px;
        }
    </style>
</head>

<body>
    <h2 style="text-align: center;">Alumni Form</h2>
    <form id="alumniForm" onsubmit="return validateForm()">
        <input type="text" id="name" placeholder="Name">
        <span class="error" id="nameError"></span>

        <input type="text" id="address" placeholder="Address">
        <span class="error" id="addressError"></span>

        <input type="date" id="dob" placeholder="Date of Birth">
        <span class="error" id="dobError"></span>

        <input type="text" id="email" placeholder="Email">
        <span class="error" id="emailError"></span>

        <button type="submit">Submit</button>
    </form>

    <script>
        function validateForm() {
            const name = document.getElementById("name").value.trim();
            const address = document.getElementById("address").value.trim();
            const dob = document.getElementById("dob").value;
            const email = document.getElementById("email").value.trim();

            const nameError = document.getElementById("nameError");
            const addressError = document.getElementById("addressError");
            const dobError = document.getElementById("dobError");
            const emailError = document.getElementById("emailError");

            // Reset errors
            nameError.textContent = "";
            addressError.textContent = "";
            dobError.textContent = "";
            emailError.textContent = "";

            let isValid = true;

            // Check if all fields are filled
            if (name === "") {
                nameError.textContent = "Name is required.";
                isValid = false;
            }

            if (address === "") {
                addressError.textContent = "Address is required.";
                isValid = false;
            }

            if (dob === "") {
                dobError.textContent = "Date of Birth is required.";
                isValid = false;
            } else {
                const birthYear = new Date(dob).getFullYear();
                const currentYear = new Date().getFullYear();
                const age = currentYear - birthYear;

                if (age < 22) {
                    dobError.textContent = "You must be at least 22 years old.";
                    isValid = false;
                }
            }

            // Validate email
            if (email === "" || !email.includes("@") || !email.includes(".")) {
                emailError.textContent = "Enter a valid email address.";
                isValid = false;
            }

            return isValid;
        }
    </script>
</body>

</html>