取得鼠标所在位置的对象

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<script type="text/javascript"><!--google_ad_client = "pub-2947489232296736";/* 728x15, 创建于 08-4-23MSDN */google_ad_slot = "3624277373";google_ad_width = 728;google_ad_height = 15;//--></script><script type="text/javascript"src="http://pagead2.googlesyndication.com/pagead/show_ads.js"></script>
<script type="text/javascript"><!--google_ad_client = "pub-2947489232296736";/* 160x600, 创建于 08-4-23MSDN */google_ad_slot = "4367022601";google_ad_width = 160;google_ad_height = 600;//--></script><script type="text/javascript"src="http://pagead2.googlesyndication.com/pagead/show_ads.js"></script>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> 取得鼠标所位置对象 </TITLE>
<META NAME="Author" CONTENT="宝玉 [url]http://www.nwpubbs.net[/url]">
</HEAD>
<script language="javascript">
    <!--
 function fnGetTable( oEl )
    {
  try{
   while( null != oEl && oEl.tagName!="TABLE" )
   {
    oEl = oEl.parentElement;
   }
   return oEl;
  }
  catch(e)
  {
   return null;
  }
    }
 function pos()
 {
  try{
  oElement = document.elementFromPoint(event.x,event.y);
  oElement = fnGetTable(oElement);
  if(oElement.tagName=="TABLE")
   show.innerText=oElement.id;
  }
  catch(e)
  {}
    }
 // -->
</script>
<BODY onmousemove="pos()">
<table border="1" cellpadding="" cellspacing="" width="" id="table1">
<tr>
 <td>table1</td>
</tr>
</table>
<table border="1" cellpadding="" cellspacing="" width="" id="table2">
<tr>
 <td>table2</td>
</tr>
</table>
<table border="1" cellpadding="" cellspacing="" width="" id="table3">
<tr>
 <td>table3</td>
</tr>
</table>
<table border="1" cellpadding="" cellspacing="" width="" id="table4">
<tr>
 <td>table4</td>
</tr>
</table>
<table border="1" cellpadding="" cellspacing="" width="" id="table5">
<tr>
 <td>table5</td>
</tr>
</table>
<table border="1" cellpadding="" cellspacing="" width="" id="table6">
<tr>
 <td>table6</td>
</tr>
</table>
鼠标当前在:<span id="show"></span>
</BODY>
</HTML><script type="text/javascript"><!--google_ad_client = "pub-2947489232296736";/* 728x15, 创建于 08-4-23MSDN */google_ad_slot = "3624277373";google_ad_width = 728;google_ad_height = 15;//--></script><script type="text/javascript"src="http://pagead2.googlesyndication.com/pagead/show_ads.js"></script>
<script type="text/javascript"><!--google_ad_client = "pub-2947489232296736";/* 160x600, 创建于 08-4-23MSDN */google_ad_slot = "4367022601";google_ad_width = 160;google_ad_height = 600;//--></script><script type="text/javascript"src="http://pagead2.googlesyndication.com/pagead/show_ads.js"></script>
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