input輸入字母自動變成大寫

輸入字母自動變成大寫：

<script type="text/javascript">

  function forceInputUppercase(e)
  {
    var start = e.target.selectionStart;
    var end = e.target.selectionEnd;
    e.target.value = e.target.value.toUpperCase();
    e.target.setSelectionRange(start, end);
  }

  document.getElementById("field1").addEventListener("keyup", forceInputUppercase, false);
  document.getElementById("field2").addEventListener("keyup", forceInputUppercase, false);

</script>