Question

question 2 javascript

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Answer 1

Please find below java script code for validation 

<script type="text/javascript">
function allLetter() {
            var name = document.querySelector("#name").value;

            var letters = /^[A-Za-z]*$/;
            if (letters.test(name)) {
                return true;
            } else {
                alert("Not a valid Name");
                return false;
            }
        }

        function rollnumber() {
            var roll = document.querySelector("#roll").value;

            var phoneno = /^\d{7}$/;
            if (phoneno.test(roll)) {
                return true;
            } else {
                alert("Not a valid Roll Number");
                return false;
            }
        }

        function date() {
            var date = document.querySelector("#date").value;

            if (!date) {
                return true;
            }
            else {
                alert("Empty Date");
                return false;
            }
        }

        function check() {

            var t1 = allLetter();
            var t2 = rollnumber();
            var t3 = date();

            console.log(t1);
            console.log(t2);
            console.log(t3);

            if (t1 && t2 && t3) {
                alert("Registration Successful");
                return true;
            } else {
                alert("One or More Fields are incorrectly set");
                return false;
            }
        }

</script>

<h2>STUDENT REGISTRATION FORM</h2>

                <form name="form1" method="post" onsubmit="return check()">
                        
                        <input type="submit" value="Register">
                </form>

        </body>