function validate_form ( ){valid = true;if ( document.form1.firma.value == "" ){alert ( "Molimo unesite naziv firme..." );valid = false;return valid;}if ( document.form1.adresa.value == "" ){alert ( "Molimo unesite adresu..." );valid = false;return valid;}if ( document.form1.telefon.value == "" ){alert ( "Molimo unesite telefon..." );valid = false;return valid;}if ( document.form1.email.value == "" ){alert ( "Molimo unesite email..." );valid = false;return valid;}return valid;}