[导入][Code]ie和firefox在img嵌套在div中onclick事件的不同

ie和firefox在img嵌套在div中onclick事件的不同

为什么一定要这样？

<div id="ryan" style="position:absolute; top:0px; left:0px; border: 0px solid black; width:680px; height:639px">
<img id="imgFloor"  ></img>
 <script language=javascript>
  if (document.getElementById && !document.all)
   $('ryan').onclick =GetImageClick;
  else
   $('imgFloor').onclick =GetImageClick;
</script>
</div>

文章来源:http://jinweijie.blogspot.com/2006/09/codeiefirefoximgdivonclick.html