how can I create a window and load A.aspx to the inside of this window,but I wanna render window to the form1 element.(Main.aspx).when I clcik the button run my script and load it.(I need to iframe also)how can I create a window and load A.aspx to th
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ExtJs：我如何创建一个窗口并在其中加载A.aspx页面
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