script.js

function validateForm() {
    const fullName = document.getElementById("fullName").value.trim();
    const email = document.getElementById("email").value.trim();
    const password = document.getElementById("password").value;
    const confirmPassword = document.getElementById("confirmPassword").value;
    const age = document.getElementById("age").value;

    // Full Name: not empty & at least 2 words
    if (fullName === "" || fullName.split(" ").length < 2) {
        alert("Full Name must contain at least two words.");
        return false;
    }

    // Email format
    const emailPattern = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
    if (!emailPattern.test(email)) {
        alert("Please enter a valid email address.");
        return false;
    }

    // Password rules
    const passwordPattern = /^(?=.*[A-Z])(?=.*\d)(?=.*[@$!%*?&]).{8,}$/;
    if (!passwordPattern.test(password)) {
        alert(
            "Password must be at least 8 characters long, contain one uppercase letter, one number, and one special character."
        );
        return false;
    }

    // Confirm Password
    if (password !== confirmPassword) {
        alert("Passwords do not match.");
        return false;
    }

    // Age check
    if (age < 18) {
        alert("You must be at least 18 years old to register.");
        return false;
    }

    // Success
    alert("Registration successful!");
    return true;
}