摘要： <= IE6：IE6 下如果iframe很多，子框架的BeforeNavigate2，DownloadBegin，DownloadComplete，DocumentComplete可能交替出现打开新网页刷新现有页面主窗口 BeforeNavigate2 (top most)主窗口 DownloadBegin (top most)主窗口 DownloadComplete(top most)主窗口DownloadBegin (top most)主窗口DownloadComplete(top most)主窗口 DownloadBegin (top most)主窗口 NavigateComple 阅读全文