Show me a Simple javascript onSubmit handler

Question

Hello again everyone i am working on this

Answer 1

OnSubmit is invoked once for the form.

You can validate all the form fields in one onSubmit function, during one call to that function.

function myOnSubmitHandler(theForm) { 
    if (theForm.data1.value == "") { 
        alert("This field is empty.");
        return false; // suppress form submission
    } else {
        return true; // A-OK, form will be submitted
    }
}

in HTML: