if (mtDropDown.isSupported()) {

		var ms = new mtDropDownSet(mtDropDown.direction.down, 0, 0, mtDropDown.reference.bottomLeft);
		
		var menu3 = ms.addMenu(document.getElementById("menu3"));
	menu3.addItem("油气集输加热", "show.php?sort=4");
		menu3.addItem("油田污水处理", "show.php?sort=3");
		menu3.addItem("工业与民用锅炉", "show.php?sort=1");
		menu3.addItem("石油专用管材", "show.php?sort=5");
		menu3.addItem("钻采设备", "show.php?sort=6");
		menu3.addItem("燃烧器", "show.php?sort=2");
			
		var menu4 = ms.addMenu(document.getElementById("menu4"));
		menu4.addItem("研发实力          ", "technic.php");
		menu4.addItem("专利技术", "technic_01.php");
				
		var menu6 = ms.addMenu(document.getElementById("menu6"));
		menu6.addItem("资质证书          ", "quality.php");
		menu6.addItem("质量控制", "quality_01.php");


		mtDropDown.renderAll();
	}


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