<html> <head> <script type="text/javascript"> function checkWin() { if (myWindow.closed) { alert("新窗口已经关闭!") } else { alert("新窗口没有关闭!") } } </script> </head> <body> <script type="text/javascript"> myWindow=window.open('','','width=200,height=100') myWindow.document.write("这是一个新窗口") </script> <input type="button" value="检验新窗口的状态" onClick="checkWin()" /> </body> </html>