function upis() {
	var v_ime = document.contact_us.form_name;
	var v_e_mail = document.contact_us.form_email;
	var v_poruka = document.contact_us.form_enquiry;
	
		
	if (v_ime.value == "") {
		alert("Upisite ime i prezime !");
		v_ime.focus();
	} else if (v_e_mail.value == "") {
		alert("Upisite e-mail !");
		v_e_mail.focus();
	} else if ((v_e_mail.value != "") && ((v_e_mail.value.indexOf("@") == -1) || (v_e_mail.value.indexOf(".") == -1))) {
		alert("Upisite pravilno e-mail !");
		v_e_mail.focus();
	} else if (v_poruka.value == "") {
		alert("Upisite poruku !");
		v_poruka.focus();
	} else {
		document.contact_us.submit();
	}
}