捕捉IE关闭按钮事件
<html> <head> <title>捕捉IE关闭按钮事件</title> <SCRIPT language=javascript> window.onbeforeunload = function(){ var n = window.event.screenX - window.screenLeft; var b = n > document.documentElement.scrollWidth-20; var number=0; if (b && window.event.clientY < 0 || window.event.altKey) { if(number<15){ window.event.returnValue = "此时将关闭窗口！您确定吗？"; } } } </SCRIPT> <head> <body> nothing..... </body></html>?