// JavaScript Document
var Xpos = 0;
var Ypos = 0;
var Ygravity = 0.9;
var scrollPos = 0;
var oldScrollPos = 0;


function FloatMenu() { 
docHeight = document.body.clientHeight; // update document height
oldScrollPos = scrollPos;
scrollPos = document.body.scrollTop; // update scrollbar position
if(scrollPos > 600) scrollPos = 580;

Yboundary = scrollPos + 240;

if (floater.offsetTop < Yboundary - 10) // Object is behind boundary
Ypos += 3;

if (floater.offsetTop > Yboundary + 10) // Object is past boundary
Ypos -= 3;

Ypos *= Ygravity; // Slow object down

floater.style.pixelTop += Ypos; // Make object bounce
}
window.setInterval("FloatMenu()", 28); 
//Ë«»÷¹öÆÁµ¥»÷Í£Ö¹
var currentpos,timer;	
function initialize()
  {timer=setInterval("scrollwindow()",40);}
function sc()
  {clearInterval(timer);}
function scrollwindow()
  {currentpos=document.body.scrollTop;
  window.scroll(0,++currentpos);
  if (currentpos != document.body.scrollTop)
    sc();}
  document.onmousedown=sc
  document.ondblclick=initialize