求一个js小例子

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head><body>
<script language="javascript">
var win;
function openAndClose(url,t)
{
win = window.open(url);
window.setTimeout("win.close()",t);
}
</script><a href="#" onclick="javascript:openAndClose('http://www.baidu.com',5000)">baidu</a> 
<a href="#" onclick="javascript:openAndClose('http://g.cn',5000)">google</a>
</body>
</html>

解决方案 »

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<script>
var win2, win3;
function open2(){
win2 = open("2.html");
setTimeout("close2()",5000);
}
function open3(){
win3 = open("3.html");
setTimeout("close3()",5000);
}
function close2(){
win2.close();
}
function close3(){
win3.close();
}
</script><a href="javascript:open2();void(0);">open 2</a>
<a href="javascript:open3();void(0);">open 3</a>
你好，你的代码是对的，但是如果我点击弹出的是一个模态对话框，我如何获得这个对话框对象啊？
var a = window.showModalDialog('http://www.hao123.com');
window.setTimeout("a.close()",1000);
我这样写是不对的!
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
<script type="text/javascript">

</script>
  </head>
  <body>
   <input type="button" name="sub" id="sub" onclick="showModal()" value="submit"/>
  </body>
</html><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>Untitled2</title>
<script type="text/javascript">
function winClose()//装载事件控制自己规定时间后关闭
{
window.setTimeout("window.close()",3000);

}
</script>
  </head>

  <body onload="winClose()">
   The window will be closed!!<br>
  </body>
</html>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
<script type="text/javascript">

</script>
  </head>
  <body>
   <input type="button" name="sub" id="sub" onclick="showModal()" value="submit"/>
  </body>
</html><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>Untitled2</title>
<script type="text/javascript">
function winClose()
{
window.setTimeout("window.close()",5000);

}
</script>
  </head>

  <body onload="winClose()">
   等下会关闭!!<br>
  </body>
</html>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
<script type="text/javascript">

</script>
  </head>
  <body>
   <input type="button" name="sub" id="sub" onclick="showModal()" value="submit"/>
  </body>
</html>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>Untitled2</title>
<script type="text/javascript">
function winClose()
{
window.setTimeout("window.close()",5000);

}
</script>
  </head>

  <body onload="winClose()">
   The window will be closed!!<br>
  </body>
</html>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
<script type="text/javascript">

</script>
  </head>
  <body>
   <input type="button" name="sub" id="sub" onclick="showModal()" value="submit"/>
  </body>
</html>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>Untitled2</title>
<script type="text/javascript">
function winClose()
{
window.setTimeout("window.close()",5000);

}
</script>
  </head>

  <body onload="winClose()">
   The window will be closed!!<br>
  </body>
</html>