Question

I need help with javascript. here is my problem:

<script type="text/javascript">
    function validateForm() {
        var ime = document.getElementById('ime');
        var prezime = document.getElementById('prezime');
        var telefon = document.getElementById('telefon');
        var datum = document.getElementById('datum');
        var patt1 = /^\+[0-9]+$/;
        if (telefon.match(patt1) == null) {
            alert("Niste dobro uneli broj");

        }
        if (ime.value.length == 0 && prezime.value.length == 0 && telefon.value.length == 0 && datum.value.length == 0) {
            alert("Niste dobro uneli podatke!");
            return false;
        }

    }
</script>
<form action="popup.php" method="post" onsubmit="return validateForm()">Vase ime:
    <input type="text" name="ime" id="ime"> <br/>
    Vase prezime:
    <input type="text" name="prezime" id="prezime"> <br/>
    Broj telefona:
    <input type="text" name="telefon" id="telefon"> <br/>
    Datum rodjenja:
    <input type="text" name="datum" id="datum"> <br/>
    <input type="submit" name="save" value="sacuvaj">
</form>

I don’t understand why telefon.match(patt1)==null) doesn’t work. Please help!

Answer 1

Reason is because you can’t apply regex to HTML Element, you can apply it to its value:

var telefon = document.getElementById('telefon').value;

Then you can execute your regex on var telefon