function hide_menu() {
				if (n6) {
					document.getElementById("m_serv").style.visibility = "hidden";
					document.getElementById("m_cont").style.visibility = "hidden";
					document.getElementById("m_clie").style.visibility = "hidden";
				} else if (ie) {
					document.all("m_serv").style.visibility = "hidden";
					document.all("m_cont").style.visibility = "hidden";
					document.all("m_clie").style.visibility = "hidden";
				}
			}

			function show_menu(menu, base) {
				var iTop, iLeft;
				
				hide_menu();
				if (n6) {
					iTop = document.getElementById("main").offsetTop;
					iTop += document.getElementById("indent1").offsetTop;
					iTop += document.getElementById(base).offsetParent.offsetTop;
					iTop += document.getElementById(base).offsetTop;
					iTop += document.getElementById(base).offsetHeight;
					iLeft = document.getElementById("main").offsetLeft;
					iLeft += document.getElementById("indent1").offsetLeft;
					iLeft += document.getElementById(base).offsetParent.offsetLeft;
					iLeft += (document.getElementById(base).offsetLeft + 3);
					document.getElementById(menu).style.top = iTop;
					document.getElementById(menu).style.left = iLeft;
					document.getElementById(menu).style.visibility = "visible";
				} else if (ie) {
					iTop = document.all("main").offsetTop;
					iTop += document.all("indent1").offsetTop;
					iTop += document.all(base).offsetParent.offsetTop;
					iTop += document.all(base).offsetTop;
					iTop += document.all(base).offsetHeight;
					iLeft = document.all("main").offsetLeft;
					iLeft += document.all("indent1").offsetLeft;
					iLeft += document.all(base).offsetParent.offsetLeft;
					iLeft += (document.all(base).offsetLeft - 3);
					document.all(menu).style.top = iTop;
					document.all(menu).style.left = iLeft;
					document.all(menu).style.visibility = "visible";
				}
			}