var menuShowing = false;

function initEvent () {
	if (document.addEventListener) {
		document.addEventListener("mousemove", handleMove, true);
	} else {
		if (NS4) {
			document.captureEvents(Event.MOUSEMOVE);
			document.onmousemove = handleMove;
		} else {
			document.body.onmousemove = handleMove;
		}
	}
}

function handleMove (ev) {
	if (!ev) {
		ev = window.event;
	}
	var mouseX = ev.pageX ? ev.pageX : ev.clientX;
	
	var scrollX;
	if (window.pageXOffset) { // all except Explorer
		scrollX = 0;
	} else if (document.documentElement && document.documentElement.scrollLeft) { // Explorer 6 Strict
		scrollX = document.documentElement.scrollLeft;
	} else if (document.body) { // all other Explorers
		scrollX = document.body.scrollLeft;
	}
	
	var containerLeft = document.getElementById('mainContainer').offsetLeft - scrollX;
	var sidebarLeft   = containerLeft + 810;
	var sidebarRight  = containerLeft + 970;
	
	if (menuShowing) {
		if (mouseX < sidebarLeft || mouseX > sidebarRight) hideMenu();
	} else {
		if (mouseX > sidebarLeft && mouseX < sidebarRight) showMenu();
	}
}

function showMenu() {
	menuShowing = true;
	getElement("id", "plusMinus").src = "../../../sport-stiftung.de/images/minus_icon.gif";
	if (NS4) {
		getElement("id", "expandMenu").color = "white";
		getElement("id", "sidebar").visibility = "show";
		getElement("id", "bottomSpacer").backgroundImage = "url(../../../sport-stiftung.de/images/fuss_schatten_lang.gif)";
		getElement("id", "mainContainer").backgroundImage = "url(../../../sport-stiftung.de/images/bg_exp.png)";
	} else {
		getElement("id", "expandMenu").style.color = "white";
		getElement("id", "sidebar").style.visibility = "visible";
		getElement("id", "bottomSpacer").style.backgroundImage = "url(../../../sport-stiftung.de/images/fuss_schatten_lang.gif)";
		getElement("id", "mainContainer").style.backgroundImage = "url(../../../sport-stiftung.de/images/bg_exp.png)";
	}
}

function hideMenu() {
	menuShowing = false;
	getElement("id", "plusMinus").src = "../../../sport-stiftung.de/images/plus_icon.gif";
	if (NS4) {
		getElement("id", "expandMenu").color = "#b0b0b0";
		getElement("id", "sidebar").visibility = "hide";
		getElement("id", "bottomSpacer").backgroundImage = "url(../../../sport-stiftung.de/images/fuss_schatten.gif)";
		getElement("id", "mainContainer").backgroundImage = "url(../../../sport-stiftung.de/images/bg.png)";
	} else {
		getElement("id", "expandMenu").style.color = "#b0b0b0";
		getElement("id", "sidebar").style.visibility = "hidden";
		getElement("id", "bottomSpacer").style.backgroundImage = "url(../../../sport-stiftung.de/images/fuss_schatten.gif)";
		getElement("id", "mainContainer").style.backgroundImage = "url(../../../sport-stiftung.de/images/bg.png)";
	}
}