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我有一个包含两个框架（top.html 和 bottom.html）的框架集。我想在第二帧（底部）中创建一个弹出浮动图像，但在第一帧（顶部）中有脚本来执行此操作。这可能吗？如何？
<frameset id="mainFrame" rows="25%,75%"> <frame id="f1" src="top.html"> <frame id="f2" src="bottom.html"> </frameset>