100分！！！[精典]窗口关闭问题！

Question

B.htm:
<script language="javascript">
var meizz=window.open("C.htm");
function closeWindow()
{
  if (typeof(meizz)!="undefined" && meizz.open && !meizz.closed)
      meizz.close();
}
window.onbeforeunload = function()
{
  var n = window.event.screenX - window.screenLeft;
  var b = n > document.documentElement.scrollWidth-20;
  if(b && window.event.clientY < 0 || window.event.altKey)
  {
    closeWindow();
  }
}
</script>

Answer 1

为什么不行？？？还有不管什么情况下，只要B.htm窗口，就关闭C.htm窗口。A.htm
------------------------------------------------------------------------
<SCRIPT LANGUAGE="JavaScript">
<!--
function openRegWin(){
      var winTrue = window.open("b.htm");
      winTrue.focus();
}//-->
</SCRIPT>
A窗口: <a href="#" onclick="openRegWin()">弹出B窗口</a>
B.htm
---------------------------------------------------------------------------
<script language="javascript">
<!--
function fiximgwin(ImgD)
{
var imgwin=window.open('','img','width=300,height=200')
imgwin.focus()
var HTML="<font size=10 color=red>这是C窗口</font>"
var doc=imgwin.document
doc.open("text/html","replace")
doc.write(HTML)
doc.close()}function closeWindow()
{
  if (typeof(imgwin)!="undefined" && imgwin.open && imgwin.closed)
      imgwin.close();
}
window.onbeforeunload = function()
{
  var n = window.event.screenX - window.screenLeft;
  var b = n > document.documentElement.scrollWidth-20;
  if(b && window.event.clientY < 0 || window.event.altKey)
  {
    closeWindow();
  }
}//--></script>
B窗口: <a href="#" onclick=fiximgwin(this)>弹出C窗口</a>C.htm
--------------------------------------------------------------------
<font size=20 color=red>C窗口</font>