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js监控IE火狐浏览器关闭、刷新、回退、前进事件_javascript技巧: test var flag = true; window.onbeforeunload = function () { if (flag) { var evt = window.event arguments[0]; var userAgent = navigator.userAgent; if (userAgent.indexOf(MSIE) > 0) { var n = window.event.screenX - window.screenLeft
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