CS50B_Web-Development_conspect/form1.html at main · MarkOpan/CS50B_Web-Development_conspect · GitHub

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<!--A form with client-side validation added & no data is sent to backend
br/ - is used for line breaks-->

<!DOCTYPE html>
<html>
    <head>
        <title>form1</title>
    </head>
    <body>
        <form>
            Email: <input name="email" type="text"/>
            <br/>
            Password: <input name="password" type="password"/>
            <br/>
            Password(again): <input name="confirmation" type="password"/>
            <br/>
            I agree to the Terms & Conditions: <input name="agreement" type="checkbox"/>
            <br/><br/>
            <input type="submit" value="Register"/>
        </form>
        <script>
            var form = document.getElementById('form');
            form.onsubmit = function()
            {
                if (form.email.value == '')
                {
                    alert('You must provide email address');
                    return false;
                }
                else if (form.password.value == '')
                {
                    alert ('You must provide password');
                    return false;
                }
                else if (form.password.value != form.confirmation.value)
                {
                    alert('Passwords do not match');
                    return false;
                }
                else if (!form.agreement.checked)
                {
                    alert('You must agree to Terms & Conditions!');
                    return false;
                }
                return false;
        };
        </script>
    </body>
</html>