快速上下移動到網頁的頂部和底部

 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html class=" widthauto" xmlns="http://www.w3.org/1999/xhtml"><head>
<meta http-equiv="Content-Type" content="text/html; charset=gbk">
<title>gdm</title>

</head>

<body>
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<script src="images/top.js" type="text/javascript"></script>

 
</font></p>
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</body></html>

 

function show(o,obj){
  var m=document.getElementById(obj);
  m.style.pixelLeft=getL(o);
  m.style.pixelTop=getT(o)+o.offsetHeight;
  m.style.visibility='';
}
var speed=10
var currentpos=0,alt=1,curpos1=0,curpos2=-1
function initialize(){
startit()
}
function scrollwindow(){

if (document.all)
temp=document.documentElement.scrollTop
else
temp=window.pageYOffset
if (alt==0)
alt=1
else
alt=0
if (alt==0)
curpos1=temp
else
curpos2=temp
if (curpos1!=curpos2){
if (document.all)
currentpos=document.documentElement.scrollTop-speed
else
currentpos=window.pageYOffset-speed
window.scroll(0,currentpos)
}
else{
currentpos=0
window.scroll(0,currentpos)
}
if(document.documentElement.scrollTop<5)

window.clearInterval(intervalID);
}
}
function startit(){

intervalID=setInterval("scrollwindow()",5)
}
lastScrollY=0;
function heartBeat(){
var diffY;
if (document.documentElement && document.documentElement.scrollTop)
    diffY = document.documentElement.scrollTop;
else if (document.body)
    diffY = document.body.scrollTop
else
    {/*Netscape stuff*/}

percent=.1*(diffY-lastScrollY);
if(percent>0)percent=Math.ceil(percent);
else percent=Math.floor(percent);
document.getElementById("full").style.top=parseInt(document.getElementById("full").style.top)+percent+"px";

lastScrollY=lastScrollY+percent;
}
suspendcode="<div id=\"full\" style='right:0px; top:200px; position:absolute;'><table width='20' border='0' cellpadding='0' cellspacing='0'><tr><td align='center'><a href='javascript:window.scroll(99999,0)' onfocus='blur()'><img border='0' src='images/1.png' title='回到網站頂部' /></a></td></tr><tr><td align='center'><a href='tencent://message/?uin=81596583&Site=web-designers&Menu=yes' target='blank'><img src='images/4.png' border='0' title='聯繫站長QQ' /></a></td></tr><tr><td align='center'><a onclick='javascript:history.back();return false;' href='#'><img border='0' src='images/5.png' title='返回上一頁' /></a></td></tr><tr><td align='center'><a onclick='javascript:clearInterval(timer);initialize();return false;' href='#'><img border='0' src='images/6.png' title='頁面向上慢移' /></a></td></tr><tr><td align='center'><a onclick='javascript:sc();return false;' href='#'><img border='0' src='images/7.png' title='暫停慢移' /></a></td><tr><td align='center'><a onclick='window.parent.document.location.reload();return false;' href='#'><img border='0' src='images/8.png' title='刷新頁面' /></a></td><tr><td align='center'><a onclick='javascript:amubutton();return false;' href='#'><img border='0' src='images/9.png' title='回到底部' /></a></td></tr></table></div>"

document.write(suspendcode);
window.setInterval("heartBeat()",1);

     var currentpos,timer;
     function initialize()
     {
     timer=setInterval ("scrollwindow ()",30);
     }
     function sc()
     {
     clearInterval(timer);
     }
     function scrollwindow()
     {
     
     currentpos = document.documentElement.scrollTop || document.body.scrollTop; 

     window.scrollTo(0,++currentpos);
     //window.alert(currentpos)
     //if (currentpos>10)
     //sc();
     }
     //document.onmousedown=sc;
     function amutop()
     {
     window.scrollTo(0,0)
     clearInterval(timer);
     }
     function amubutton()
     {
     window.scrollTo(0,80000)
     clearInterval(timer);
     }

 

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