function email(konto,domena,pripona) {
   window.location = "mailto:" + konto + "@" + domena + "." + pripona + "?subject=Info%20zo%20str%C3%A1nky%20www.etosedu.sk";
  }
  
// zobrazenie a skrytie okna
  function closewin(name) {
   var div = document.getElementById(name);
   div.style.display="none";
  }
  
  function openwin(name) {
   var div = document.getElementById(name);
   div.style.display="inline";
  }

/* ---------- Newsletter */
  function sendnewstetter() {
   var el = document.newsletter, err= "";
   
    if(el.newslettermeno.value.length < 1 || el.newslettermeno.value == defineval1) {
     document.getElementById('inputboxing1').style.borderColor="red";
     el.newslettermeno.value=defineallert1;
     err += "1";
    }
    
    else if(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(el.newsletteremail.value) == false) {
     document.getElementById('inputboxing').style.borderColor="red";
     el.newsletteremail.value=defineallert;
     err += "1";
    }
    
    else if(el.newslettermesto.value.length < 1 || el.newslettermesto.value == defineval3) {
     document.getElementById('inputboxing3').style.borderColor="red";
     el.newslettermesto.value=defineallert3;
     err += "1";
    }
    
    else if(el.newslettercheck.checked == false) {
     document.getElementById('lcheck').style.color="red";
     err += "1";
    }  

   if(err == "") { return true; }
    else { return false; }
  }

/* ---------- Prihlasenie do kurzu */
  function prihlasenie() {
   var el = document.prihlas, err= "";

   if(el.prenes1.value.length < 4) {
    err += " - " + loginallert1 + "\n";
   }
   
   if(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(el.prenes2.value) == false) {
    err += " - " + loginallert2 + "\n";
   }
   
   if(el.prenes3.value.length < 6) {
    err += " - " + loginallert3 + "\n";
   }
   
   if(el.prenes4.value.length < 2) {
    err += " - " + loginallert4 + "\n";
   }
   
   if(el.prenes5.value.length < 1) {
    err += " - " + loginallert5 + "\n";
   }
   
   if(el.prenes6.value.length < 4) {
    err += " - " + loginallert6 + "\n";
   }

   if(err != "") {
    err = allertname + "\n\n" + err;
    window.alert(err);
    return false;   
   }
    else {
     return true;
    }
  }

/* ---------- Prihlasenie do testovania */
  function prihlasenietest() {
   var el = document.prihlasit, err= "";

   if(el.prenes1.value.length < 4) {
    err += " - " + testlogin1 + "\n";
   }
   
   if(el.prenes2.value.length < 4) {
    err += " - " + testlogin2 + "\n";
   }

   if(err != "") {
    err = allertname + "\n\n" + err;
    window.alert(err);
    return false;   
   }
    else {
     return true;
    }
  }

/* ---------- Registracia do testovania */
  function regtest() {
   var el = document.registrovat, err= "";

   if(el.prenes1.value.length < 4) {
    err += " - " + regtest1 + "\n";
   }
   
   if(el.prenes2.value.length < 4) {
    err += " - " + regtest2 + "\n";
   }
   
   if(el.prenes3.value.length < 4) {
    err += " - " + regtest3 + "\n";
   }
   
   if(el.prenes4.value.length < 4) {
    err += " - " + regtest4 + "\n";
   }
   
   if(el.prenes5.value.length < 4) {
    err += " - " + regtest5 + "\n";
   }
   
   if(el.prenes6.value.length < 4) {
    err += " - " + regtest6 + "\n";
   }   
    else if(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(el.prenes6.value) == false) {
     err += " - " + regtest7 + "\n";
    }
   
   if(el.prenes8.value.length < 6) {
    err += " - " + regtest8 + "\n";
   }
   
   if(el.prenes9.value.length < 4) {
    err += " - " + regtest9 + "\n";
   }
   
   if(el.prenes10.value.length < 4) {
    err += " - " + regtest10 + "\n";
   }
   
   if(el.prenes9.value != el.prenes10.value) {
    err += " - " + regtest11 + "\n";
   }


   if(err != "") {
    err = allertname + "\n\n" + err;
    window.alert(err);
    return false;   
   }
    else {
     return true;
    }
  }

/* ---------- Zistenie zabudnuteho hesla */
  function zabudnuteheslo() {
   var el = document.zistiheslo, err= "";
   
   if(el.prenes1.value.length < 4) {
    err += " - " + heslotest1 + "\n";
   }

   if(err != "") {
    err = allertname + "\n\n" + err;
    window.alert(err);
    return false;   
   }
    else {
     return true;
    }
  }