var sysOpenContainer = null;
var sysOpenMenus = null;
var sysHideMenuTimer = null;

function SYS_menuStartTimeout(hideTimeout) {
	sysHideMenuTimer = setTimeout("SYS_menuHideMenus()", hideTimeout);	
}

function SYS_menuHideMenus() {
	SYS_menuResetTimeout();
	if(sysOpenContainer) {
		var c = document.getElementById(sysOpenContainer);
		c.style.visibility = "inherit";
		sysOpenContainer = null;
	}
	if( sysOpenMenus ) {
		for(var i = 0; i < sysOpenMenus.length ; i++) {
			var m = document.getElementById(sysOpenMenus[i]);
			m.style.visibility = "hidden";			
		}
		sysOpenMenus = null;
	}
}

function SYS_menuHideSubmenus(menuName) {
	if( sysOpenMenus ) {
		var h = false;
		var c = 0;
		for(var i = 0; i < sysOpenMenus.length ; i++) {
			if( h ) {
				var m = document.getElementById(sysOpenMenus[i]);
				m.style.visibility = "hidden";
			} else if( sysOpenMenus[i] == menuName ) {
				h = true;
			} else {
				c++;
			}
		}
		sysOpenMenus.length = c+1;
	}
}

function SYS_menuOverMenuItem(menuName, subMenuSuffix) {
	SYS_menuResetTimeout();
	SYS_menuHideSubmenus(menuName);
	if( subMenuSuffix ) {
		var subMenuName = "" + menuName + "_" + subMenuSuffix;
		SYS_menuShowSubMenu(subMenuName);
	}
}

function SYS_menuShowSubMenu(subMenuName) {
	SYS_menuResetTimeout();
	var e = document.getElementById(subMenuName);
	e.style.visibility = "inherit";
	if( !sysOpenMenus ) {
		sysOpenMenus = new Array;
	}
	sysOpenMenus[sysOpenMenus.length] = "" + subMenuName;
}

function SYS_menuResetTimeout() {
	if (sysHideMenuTimer) clearTimeout(sysHideMenuTimer);
	sysHideMenuTimer = null;
}

function SYS_menuShowMenu(containName, menuName, xOffset, yOffset, triggerName) {
	SYS_menuHideMenus();
	SYS_menuResetTimeout();
	SYS_menuShowMenuContainer(containName, xOffset, yOffset, triggerName);
	SYS_menuShowSubMenu(menuName);
}

function SYS_menuShowMenuContainer(containName, x, y, triggerName) {	
	var c = document.getElementById(containName);
	var s = c.style;
	s.visibility = "inherit";
	
	sysOpenContainer = "" + containName;
}