IE event.srcElement和FF event.target

 可以捕获当前事件作用的对象，如event.srcElement.tagName可以捕获活动标记名称。
注意获取的标记都以大写表示，如"TD","TR","A"等

 <div id="div_001">
 <form id="form_001">
  <input type="button" id="button_001_id" name="button_001_Name" value="单击查看" class="button_001_Class" onclick="Get_srcElement(event)">

<select name="selectname" onchange="alert(event.srcElement.options[event.srcElement.selectedIndex].value);">
   <option value='001'>1</option>
   <option value='002'>2</option>
   <option value='003'>3</option>
   <option value='004'>4</option>
   <option value='005'>5</option>
  </select>
 </form>
</div>
<script>
function Get_srcElement(evgl)
{
 　　var srcElement=""
　　 //判断是IE 还是Firefox
 　　var evg=evgl.srcElement?evgl.srcElement:evgl.target;
 　　srcElement = srcElement + "\n" +  "button_001_id----event.srcElement.id : " + evg.id
 　　srcElement = srcElement + "\n" +  "input---event.srcElement.tagName : " + evg.tagName
 　　srcElement = srcElement + "\n" +  "button---event.srcElement.type : " + evg.type
 　　srcElement = srcElement + "\n" +  "单击查看---event.srcElement.value : " + evg.value
 　　srcElement = srcElement + "\n" +  "button_001_Name---event.srcElement.name : " + evg.name
 　　srcElement = srcElement + "\n" +  "button_001_Class---event.srcElement.className : " + evg.className

 　　//IE 支持parentElement  FireFox支持parentNode
 　　srcElement = srcElement + "\n" +  "form_001---event.srcElement.parentElement.id : " + 　　　　evg.parentNode.id
 　　srcElement = srcElement + "\n" +  "event.srcElement.getattribute : " + evg.getAttribute
 　　alert(srcElement);
}

</script>