firefox, IE 이벤트(event) 얻기

<script type="text/javascript">
<!--
 function test(e){
  var eSrc = e || window.event;
  var srcET = eSrc.srcElement ? eSrc.srcElement : eSrc.target;
  
  var _event = eSrc.type;
  alert(_event);

  var _type = srcET.type;
  alert(_type);

  var _tagName = srcET.tagName;
  alert(_tagName);

 }
//-->
</script>


<input type="button" name="name:input" id="inp" value="asdf" dtype="option" onclick="test(event)">