function ValidateQuantity(qtty) {
  if (qtty > 0) return true;
   else return false;
}

function ValidateLength(item, len) {
  return (item.length >= len);
}

function ValidateEmail(item) {
  if (!ValidateLength(item, 5)) return false;
  if (item.indexOf ('@', 0) == -1) return false;
  return true;
}

function FormError(elem, text) {
  if (errfound) return;
  window.alert(text);
  elem.select();
  elem.focus();
  errfound = true;
}

function cisla(elem) {
  with (event) {
    if ((keyCode>47&&keyCode<58)||keyCode==44||keyCode==46||keyCode==13) {
      if (keyCode==44||keyCode==46) {
        if (elem.value.indexOf(".")>-1) {
          returnValue = false;
        } else {
          if (keyCode==44) {
            elem.value = elem.value + ".";
            returnValue = false;
          }
        }
      }
      if (keyCode==13) returnValue = true;
    } else {
      returnValue = false;
    }
  }
}