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		menu6.addItem("视频资料", "Courseware_List.asp?group_id=2","0");
		
		menu6.addItem("投稿必读", "Courseware_List.asp?group_id=3","0");
		
		menu6.addItem("厂商资料", "Courseware_List.asp?group_id=4","0");
		

		mtDropDown.renderAll();
	}