	if (mtDropDown.isSupported()) {

		var ms = new mtDropDownSet(mtDropDown.direction.down, 0, 0, mtDropDown.reference.bottomLeft);

		var menu4 = ms.addMenu(document.getElementById("menu4"));
		menu4.addItem("  &nbsp;&nbsp;&nbsp;原料药&nbsp;&nbsp;&nbsp;", "cpjslist_yly.asp");
		menu4.addItem("  &nbsp;&nbsp;&nbsp;中间体&nbsp;&nbsp;&nbsp;", "cpjslist.asp?id=2");
		menu4.addItem("  &nbsp;&nbsp;&nbsp;精细化工品&nbsp;&nbsp;&nbsp;", "cpjslist_yly1.asp");
		menu4.addItem("  &nbsp;&nbsp;&nbsp;制剂&nbsp;&nbsp;&nbsp;", "cpjslist_yly2.asp");
		
		
		mtDropDown.renderAll();
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