option鼠标移动事件

<html><head>
<style>
#tip{display:none;position:absolute;z-index:1000;background:#ccc;border:solid:#333;}
</style>
<script>
function showDiv(event){
tip.left = event.x;
tip.top = event.y;
tip.style.display = "inline";
}
function hideDiv(event){
tip.style.display = "none";
}
</script>
</head>
<body>

<script>
function showIE6Tooltip(e){
  if(!e){var e = window.event;}
  var obj = e.srcElement;
  var objHeight = obj.offsetHeight;
  var optionCount = obj.options.length;
  var eX = e.offsetX;
  var eY = e.offsetY;

  //vertical position within select will roughly give the moused over option...
  var hoverOptionIndex = Math.floor(eY / (objHeight / optionCount));

  var tooltip = document.getElementById('ie6SelectTooltip');
  tooltip.innerHTML = "111";
  tooltip.style.display = 'block';
  }
  function hideIE6Tooltip(e){
  var tooltip = document.getElementById('ie6SelectTooltip');
  tooltip.innerHTML = '';
  tooltip.style.display = 'none';
  }
</script>
 <select id="test" title="Title on the select" οnmοusemοve="showIE6Tooltip();" οnmοuseοut="hideIE6Tooltip();">
  <option value="1" title="This is the number 1 option, with a really long title based tooltip">One Thing</option>
  <option value="2" title="This is the number 2 option, with a really long title based tooltip">Two Thing</option>
  <option value="3" title="This is the number 3 option, with a really long title based tooltip">Three Thing</option>
  <option value="4" title="This is the number 4 option, with a really long title based tooltip">Four Thing</option>
  <option value="5" title="This is the number 5 option, with a really long title based tooltip">Five Thing</option>
  <option value="6" title="This is the number 6 option, with a really long title based tooltip">Six Thing</option>
  <option value="7" title="This is the number 7 option, with a really long title based tooltip">Seven Thing</option>
  <option value="8" title="This is the number 8 option, with a really long tithhhhhhhhhhhhhhhhhhhhhhhhhhhle based tooltip">Eight Thing</option>
  </select>
  <div id="ie6SelectTooltip" style="display:none;position:absolute;padding:1px;border:1px solid #333333;;background-color:#fffedf;font-size:normal;"></div>


</body>
</html>