// JavaScript Document
function CheckEmpty(element, chyba) {
 if (arguments.length<2) chyba="";

 var v;
 if (element.type=="select-one")
  v=element.options[element.selectedIndex].text;
 else
  v=element.value;

 if (v=="") {
  if (chyba!="") {
   alert("Prosím zadajte "+chyba+" !");
   element.focus();
  }
  return false;
 }
 return true;
}

function CheckEmail(email) {
 if (window.RegExp)
  if (email.value!="") {
   var re1=/^(.+)@(.+)$/
   var rep=re1.exec(email.value);
   if (rep!=null) {
    var ename  =rep[1];
    var edomain=rep[2];
    var re2a=/^[0-9a-z_\.\-]+$/i;
    var re2b=/^"[^"]*"$/;
    var re3a=/^[0-9a-z]+[0-9a-z\-]*(\.[0-9a-z]+[0-9a-z\-]*)*\.[a-z]{2,3}$/i;
    var re3b=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
    if ((re2a.test(ename) || re2b.test(ename)) &&
        (re3a.test(edomain) || re3b.test(edomain))) return true;
   }
   alert("Zadaná adresa nie je správnou adresou elektronickej pošty!");
   email.focus();
   return false;
  }
 return true;
}

function CheckContact(c) {
 if (c.value.indexOf("@") != -1)
  return (CheckEmail(c));
 else
  return true;
}

function kontrola(Formular) {
  with (document.forms["Formular"])
  {
    if (CheckEmpty(Meno,"meno") && CheckEmpty(Email,"e-mail") && CheckEmail(Email) && CheckEmpty(Predmet,"predmet") && CheckEmpty(Sprava,"správu"))
    {
      return true;
    } else {
      return false;
    }
  }
}

function getId(name) {
 if (document.all)
  return document.all.item(name);
 else if (document.getElementById)
  return document.getElementById(name);
 else if (document.layers)
  return document.layer[name];
 else
  return null;
}