关闭窗口避免弹出确认框！

<INPUT TYPE="button" value="关闭窗口" onclick="close2();">

<INPUT TYPE="button" value="关闭浏览器" onclick="closeWin();">
<SCRIPT LANGUAGE="JavaScript">
<!--

function close2(){
//   这条语句很重要，去掉它还会弹出确认框！
	 window.open("","_self");
//   top.opener=null;
//   top.close();
//	 self.opener=null;
//	 self.close();
	 window.opener=null;
	 window.close(); 
}

function closeWin(){
   window.open("","_self");
   top.opener=null;
   top.close();

}
//-->
</SCRIPT>