function SwitchMenu(menu, obj) {

	if ((document.getElementById) && (document.getElementsByTagName)) {

		var menuobj = document.getElementById("sidemenucontainer");

		if (menuobj!=null) {

			var ar = menuobj.getElementsByTagName("div");

			for (var i = 0; i < ar.length; i++) {

				// handle arrows
				if (ar[i].className == "menu_title") {

					var arr = ar[i].getElementsByTagName("img");

					for (var j = 0; j < arr.length; j++) {

						if (arr[j].className == "menu_arrowdown") {
							if ((obj != null) && (ar[i].id == (menu + "_" + obj + "_title")) && (arr[j].style.display != "inline")) {
								arr[j].style.display = "inline";
							} else {
								arr[j].style.display = "none";
							}
						}

						if (arr[j].className == "menu_arrowright") {
							if ((obj != null) && (ar[i].id == (menu + "_" + obj + "_title")) && (arr[j].style.display != "none")) {
								arr[j].style.display = "none";
							} else {
								arr[j].style.display = "inline";
							}
						}

					}

				}

				// handle submenus
				if (ar[i].className == "menu_sub") {

					if ((obj != null) && (ar[i].id == (menu + "_" + obj + "_sub")) && (ar[i].style.display != "block")) {
						ar[i].style.display = "block";
					} else {
						ar[i].style.display = "none";
					}
				}

			}

		}

	}

}