function erydianchecker() {
if(document.forms["kontakt"].elements["imie"].value==""){
    alert('Enter your name');
  return false;
}
if(document.forms["kontakt"].elements["tel"].value==""){
    alert('Enter your contact number');
  return false;
}
if(document.forms["kontakt"].elements["emailAdr"].value==""){
    alert('Enter your Email');
  return false;
}
if(document.forms["kontakt"].elements["tresc"].value==""){
    alert('Enter message');
  return false;
}
return true;
}

function poprawnyAdres(emailAdr) {
         zleZnaki = " /:,;"
         if (emailAdr == "") {
            return false
         }
         for (i=0; i<zleZnaki.length; i++) {            
            zlyZnak=zleZnaki.charAt(i)
            if (emailAdr.indexOf(zlyZnak,0) != -1) {
               return false
            }
         }
         malpaPoz=emailAdr.indexOf("@",0)    
         if (malpaPoz == -1 || malpaPoz == 0) {
            return false
         }
         if (emailAdr.indexOf("@", malpaPoz+1) != -1) { 
            return false
         }
         kropkaPoz = emailAdr.indexOf(".",malpaPoz)   
         if(kropkaPoz==-1 || kropkaPoz==malpaPoz+1) {
            return false
         }
         if(kropkaPoz+3 > emailAdr.length) {   
            return false
         }
         return true
      }
      function wyslijDane(form) {      
         if(!poprawnyAdres(form.emailAdr.value)) {
            alert("Wrong Email address!")
            form.emailAdr.focus()
            form.emailAdr.select()
            return false
         }
         return true
      }

function erydianantyspam(alias,domena) {
                locationstring = "mailto:" + alias + "@" + domena ;
                window.location = locationstring;
                }