// JavaScript Document
var tmrID;

var offsetY = 50;
var beforeY = 50;


//
function setMenu(){

	clearInterval(tmrID);

	tmrID=setTimeout("mvMenu()",500)

}

//
function mvMenu(){

	var scrollY;	//
	var moveToY;	//
	var moveByY;	//

	if (document.all) { scrollY = document.documentElement.scrollTop; }
	else { scrollY = window.pageYOffset; }
	moveToY = scrollY+offsetY;
	moveByY = Math.floor((moveToY - beforeY) / 3);
	beforeY = beforeY+moveByY;

	moveByLayer("lyrMenu",0,moveByY);

	if(Math.abs((moveToY-beforeY)) > 1){
		tmrID=setTimeout("mvMenu()",1)
	}

}


//
function moveByLayer(idName,x,y){

	if(document.getElementById){
		var oj = document.getElementById(idName).style;
		oj.left = (parseInt(oj.left) + x ) + 'px';
		oj.top  = (parseInt(oj.top)  + y ) + 'px';
	}else if(document.all){
		document.all(idName).style.pixelLeft += x;
		document.all(idName).style.pixelTop  += y;
	}else if(document.layers){
		document.layers[idName].moveBy(x,y);
	}

}

window.onscroll=setMenu;