romanofficial / simpleValueCalculateWithPHP

Calculate Summation, Subtraction, Multiplication, Division

javascript Alert

        function validateForm() {
            var x = document.forms["myForm"]["first_number"].value;
            if (x == "" || x == null) {
                alert("Name must be filled out");
                return false;
            }
        }

call function & name

• name="myForm"
• onsubmit="return validateForm()"