var ie5 = (document.getElementById&&document.all); 
var ns6 = (document.getElementById&&!document.all); 
var menuTimer;
var currMenu = 0;

function showMenu(menuName){
	resetMenu();
	positionMenu(menuName);
	if(ie5){
		document.getElementById(menuName).filters.alpha.opacity = 0;
	}
	if(ns6){
		document.getElementById(menuName).style.MozOpacity = 0/100;
	}
	document.getElementById(menuName).style.visibility="visible";
	fadeIn(menuName, 0);
	setTimer(3000);
	currMenu = menuName;
}

function positionMenu(menuName){
	var visWidth = document.body.clientWidth;
	var margin = (visWidth-902)/2;
	if(menuName=="div0"){
		document.getElementById(menuName).style.left=margin;
		document.getElementById(menuName).style.top=285;
	}
	if(menuName=="div1"){
		document.getElementById(menuName).style.left=margin 
			+ document.images["mnuHome"].width;
		document.getElementById(menuName).style.top=285;
	}
	if(menuName=="div2"){
		document.getElementById(menuName).style.left=margin 
			+ document.images["mnuHome"].width
			+ document.images["mnuAbout"].width;
		document.getElementById(menuName).style.top=285;
	}
	if(menuName=="div3"){
		document.getElementById(menuName).style.left=margin 
			+ document.images["mnuHome"].width
			+ document.images["mnuAbout"].width
			+ document.images["mnuJump"].width;
		document.getElementById(menuName).style.top=285;
	}
	if(menuName=="div4"){
		document.getElementById(menuName).style.left=margin 
			+ document.images["mnuHome"].width
			+ document.images["mnuAbout"].width
			+ document.images["mnuJump"].width
			+ document.images["mnuPrices"].width;
		document.getElementById(menuName).style.top=285;
	}
	if(menuName=="div5"){
		document.getElementById(menuName).style.left=margin 
			+ document.images["mnuHome"].width
			+ document.images["mnuAbout"].width
			+ document.images["mnuJump"].width
			+ document.images["mnuPrices"].width
			+ document.images["mnuMedia"].width;
		document.getElementById(menuName).style.top=285;
	}
	if(menuName=="div6"){
		document.getElementById(menuName).style.left=margin 
			+ document.images["mnuHome"].width
			+ document.images["mnuAbout"].width
			+ document.images["mnuJump"].width
			+ document.images["mnuPrices"].width
			+ document.images["mnuMedia"].width
			+ document.images["mnuWhatson"].width;
		document.getElementById(menuName).style.top=285;
	}
}

function fadeIn(menuName, x){
	if(ie5){
		document.getElementById(menuName).filters.alpha.opacity = x;
	}
	if(ns6){
		document.getElementById(menuName).style.MozOpacity = x/100;
	}
	if(x < 95){
		x+=95;
		setTimeout("fadeIn('" + menuName  + "'," + x + ")",1);
	}
	return true;
}

function fadeOut(menuName, x){
	if(ie5){
		document.getElementById(menuName).filters.alpha.opacity = x;
		if(document.getElementById(menuName).filters.alpha.opacity < 20){
			document.getElementById(menuName).style.visibility="hidden";
		}
	}
	if(ns6){
		document.getElementById(menuName).style.MozOpacity = x/100;
		if(document.getElementById(menuName).style.MozOpacity < 20){
			document.getElementById(menuName).style.visibility="hidden";
		}
	}
	if(x > 0){
		x-=95;
		setTimeout("fadeOut('" + menuName  + "'," + x + ")",25);
	}
	return true;
}

function clearMenu(){
	if(currMenu){
		clearTimeout(menuTimer);
		fadeOut(currMenu, 100);
		currMenu=0;
	}
}

function resetMenu(){
	clearTimeout(menuTimer);
	if(currMenu) document.getElementById(currMenu).style.visibility="hidden";
	currMenu = 0;
}

function setTimer(delay){
	menuTimer = setTimeout("clearMenu()",delay);
}

function keepMenu(menuName){
	clearTimeout(menuTimer);
	document.getElementById(menuName).style.visibility="visible";
}