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request, reponse, out, session, application, config, pagecontext, page, exception.
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<%@ page contentType="text/html;charset=GB2312" %>
<HTML>
<BODY bgcolor=green><FONT size=1>
<FORM action="tree.jsp" method=post name=form>
<INPUT type="text" name="boy">
<INPUT TYPE="submit" value="Enter" name="submit">
</FORM>
</FONT>
</BODY>
</HTML>
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%>
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%>
<BR>
<%=buttonName%>
</FONT>
</BODY>
</HTML>
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request3.jsp
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<HTML>
<BODY bgcolor=cyan><FONT size=5>
<FORM action="" method=post name=form>
<INPUT type="text" name="girl">
<INPUT TYPE="submit" value="Enter" nam
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