var menuTopMargin = -100;
var menuSpeed = 10;
var timerSpeed = 200;
var timer;
var heightLimit = 0;
function checkMenu() {
	var eMenu0 = document.getElementById('Bar_l');
	var eMenu1 = document.getElementById('Bar_r');
	if(document.body.offsetHeight > heightLimit) {
		var reTimer = timerSpeed;
		var startPoint = parseInt(eMenu0.style.top,10);
		var endPoint;
		if (window.innerHeight) {
			endPoint = window.pageYOffset
		} else if (document.documentElement && document.documentElement.scrollTop) {
			endPoint = document.documentElement.scrollTop
		} else if (document.body) {
			endPoint = document.body.scrollTop;
		}
		endPoint = (menuTopMargin <= endPoint ) ? endPoint - menuTopMargin : 0;
		if(startPoint != endPoint) {
			moveAmount = Math.ceil(Math.abs(endPoint - startPoint) / 15);
			eMenu0.style.top = parseInt(eMenu0.style.top,10) + ((endPoint<startPoint) ? -moveAmount : moveAmount)+"px";
			eMenu1.style.top = eMenu0.style.top;
			reTimer = menuSpeed;
		}
	}else{
		eMenu0.style.top = 100;
		eMenu1.style.top = 100;
	}
	timer = setTimeout("checkMenu();",reTimer);
}
function MyMenus() {
	if(document.documentElement.clientHeight > heightLimit) document.getElementById('Bar_l').style.top = document.body.scrollTop;
	checkMenu();
}
function show(id){
	document.getElementById(id).style.display = "none";
}