// JavaScript Document

var topb = 220;
var speed = 10;
var fo = document.getElementById('menufloat');
//var doc_element = document.compatMode == 'BackCompat' ? doc_body: document.documentElement; 
//topb = doc_element.clientHeight - fo.clientHeight - 50;

function check_scrollmove()
{
	var scrollTop = document.documentElement.scrollTop || window.pageYOffset || document.body.scrollTop;
	var gt = scrollTop+topb,nt = parseInt(fo.style.top),cj = Math.abs(gt-nt),mv = cj/speed;
	if(cj==0){return;}
	var mt = cj>speed ? (nt<gt? nt+mv:nt-mv):gt;
	fo.style.top = mt+"px";
}
setInterval("check_scrollmove()",speed);