// set up drop downs anywhere in the body of the page. I think the bottom of the page is better.. 
	    // but you can experiment with effect on loadtime.
	    if (TransMenu.isSupported()) {

		    //==================================================================================================
		    // create a set of dropdowns
		    //==================================================================================================
		    // the first param should always be down, as it is here
		    //
		    // The second and third param are the top and left offset positions of the menus from their actuators
		    // respectively. To make a menu appear a little to the left and bottom of an actuator, you could use
		    // something like -5, 5
		    //
		    // The last parameter can be .topLeft, .bottomLeft, .topRight, or .bottomRight to inidicate the corner
		    // of the actuator from which to measure the offset positions above. Here we are saying we want the 
		    // menu to appear directly below the bottom left corner of the actuator
		    //==================================================================================================
		    var ms = new TransMenuSet(TransMenu.direction.down, 1, 0, TransMenu.reference.bottomLeft);

		    //==================================================================================================
		    // create a dropdown menu
		    //==================================================================================================
		    // the first parameter should be the HTML element which will act actuator for the menu
		    //==================================================================================================
		    if (document.getElementById("navItem1") != null) {
		    var menu1 = ms.addMenu(document.getElementById("navItem1"));
		    menu1.addItem("توان کاو نت", "introduction.html"); 
		    menu1.addItem("گواهینامه‌های ISO", "iso-certificates.html");
		    menu1.addItem("اسامی برخی از مشتریان", "customers.html");
		    }
		    //==================================================================================================

		    //==================================================================================================
		    if (document.getElementById("navItem2") != null) {
		    var menu2 = ms.addMenu(document.getElementById("navItem2"));
		    menu2.addItem("نمونه‌گیری", "sampling.html");
		    menu2.addItem("آزمایش‌های روغن", "oilanalyse-services.html");
		    }
		    //==================================================================================================

		    //==================================================================================================
		    if (document.getElementById("navItem3") != null) {
		    var menu3 = ms.addMenu(document.getElementById("navItem3"));
		    menu3.addItem("ورود به برنامه", "http://www.tavannet.com/CMLab");
		    menu3.addItem("معرفی و راهنمای برنامه", "articles/introducing-program.pdf");
		    }
		    //==================================================================================================

		    //==================================================================================================
		    if (document.getElementById("navItem4") != null) {
		    var menu4 = ms.addMenu(document.getElementById("navItem4"));
		    menu4.addItem("معرفي كتاب", "books3.html");
		    menu4.addItem("مقالات", "articles.html");
		    menu4.addItem("دانستنی‌های روغن", "about-oil.html");
		    menu4.addItem("سمينارها و دوره هاي آموزشي", "dore-mordad.html");
		    menu4.addItem("Case Study", "case-study1.html");
		    }
		    //==================================================================================================

		    //==================================================================================================
		    // write drop downs into page
		    //==================================================================================================
		    // this method writes all the HTML for the menus into the page with document.write(). It must be
		    // called within the body of the HTML page.
		    //==================================================================================================
		    TransMenu.renderAll();
	    }