function checkinput(inputname,message,form,type) {
 thabool = 0;
 if (type == 'string'){ if (form[inputname].value != '') { thabool = 1; } }
 if (type == 'email'){  
  valid = new RegExp("^[a-zA-Z0-9]+([.]?[a-zA-Z0-9_-]+)*[@]([a-zA-Z0-9_-]+[.])+([a-zA-Z]{2,4})$").exec(form[inputname].value);
  if (valid) { thabool = 1; } 
   }
 if (thabool == 0) {
  alert(message);
  Fat.fade_element(inputname);
  thisinput = document.getElementsByName(inputname)[0];
  form[inputname].focus();
  thisinput.className = thisinput.className+' warning';
  divje = thisinput.parentNode;
  divje.className = divje.className+' warning';
  return false;
 } else { return true; }
}