function checkWholeForm(theForm) {
    var why = "";
    why += checkEmail(theForm.mail.value);
    if (why != "") {
       alert(why);
    }
	else
	{
		document.newsletter.submit();
	}
}

function checkEmail (strng) {
var error="";
if (strng == "") {
   error = "Niste vnesli elektronskega naslova.\n";
}

    var emailFilter=/^.+@.+\..{2,3}$/;
    if (!(emailFilter.test(strng))) { 
       error = "Prosimo vnesite veljaven elektronski naslov.\n";
    }
    else {
//test email for illegal characters
       var illegalChars= /[\(\)\<\>\,\;\:\\\"\+\[\]]/
         if (strng.match(illegalChars)) {
          error = "Elektronski naslov vsebuje nedovoljene znake.\n";
       }
    }
return error;    
}