本文實例講述了JavaScript中添加隨滾動條滾動窗體的方法。分享給大家供大家參考，具體如下：
兩種實現方式：
第一種：
<script type=/"text/javascript/">
function scrollImg(){
var posX,posY;
if (window.innerHeight) {
posX = window.pageXOffset;
posY = window.pageYOffset;
}
else if (document.documentElement && document.documentElement.scrollTop) {
posX = document.documentElement.scrollLeft;
posY = document.documentElement.scrollTop;
}
else if (document.body) {
posX = document.body.scrollLeft;
posY = document.body.scrollTop;
}
var ad=document.getElementById(/"ad/");
ad.style.top=(posY+500)+/"px/";
// ad.style.left=(posX+500)+/"px/";
ad.style.left=/"90%/";
setTimeout(/"scrollImg()/",100);
}
</script>
<div id=/"ad/" style=/"position:absolute;background:#606060;width:100px;height:100px;border:1px dotted #000;line-height:100px;text-align:center; left: 103px; top: 911px;/">此廣告位招租</div>
<script type=/"text/javascript/">
scrollImg();
</script>
第二種：
<html>
<head>
<meta http-equiv=/"Content-Type/" content=/"text/html; charset=gb2312/">
<title>Drag and Drop example</title>
<script language=/"javascript/">
function picsize(obj,MaxWidth){
img=new Image();
img.src=obj.src;
if (img.width>MaxWidth)
{
return MaxWidth;
}
else
{
return img.width;
}
}
function CloseQQ()
{
divStayTopleft.style.display=/"none/";
return true;
}
var online= new Array();
</script>
</head>
<body>
<div id=/"divStay/" style=/"position: absolute/">
<table cellspacing=/"0/" cellpadding=/"0/" width=/"100%/" border=/"0/">
<tbody>
<tr>
<td valign=/"top/" width=/"7%/">
</td>
</tr>
</tbody>
</table>
</div>
<div id=/"divStayTopleft/" style=/"position: absolute/">
<table cellspacing=/"0/" cellpadding=/"0/" width=/"109/" border=/"0/">
<tr>
<td colspan=/"3/">
<a onclick=/"CloseQQ()/" href=/"javascript:;/" shape=/"circle/" coords=/"91,16,12/">
<img height=/"34/" src=/"images/qq_top.gif/" width=/"109/" usemap=/"#Map/"
border=/"0/"></a></td>
</tr>
<tr>
<td width=/"6/">
<img height=/"100/" src=/"images/qq_life.gif/" width=/"6/"></td>
<td valign=/"top/" width=/"96/" background=/"sto/qq_bg.gif/">
<table cellspacing=/"0/" cellpadding=/"0/" width=/"90/" align=/"center/" border=/"0/">
<tr>
<td height=/"30/">
<table cellspacing=/"0/" cellpadding=/"0/" width=/"90/" border=/"0/">
<tr>
<td>
<img height=/"13/" src=/"images/qq_ico1.gif/" width=/"16/"><span
class=/"font_12/"> <span style=/"font-size: 9pt/">客戶服務</span></span></td>
</tr>
</table>
</td>
</tr>
<tr>
<td>
<table border=/"0/" width=/"100%/" cellpadding=/"2/" id=/"table47/">
<tr>
<td width=/"15/" valign=/"top/" height=/"23/">
<img border=/"0/" src=/"images/qq_v01.gif/" width=/"16/" height=/"16/"></td>
<td valign=/"bottom/">
<script>document.write(/"<a target=blank href=tencent://message/?uin=178010108&Site=&Menu=yes><img border=0 SRC=http://wpa.qq.com/pa?p=1:615050000:10 alt=[]></a>/");</script>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td>
</td>
</tr>
<tr>
<td>
<table border=/"0/" width=/"100%/" cellpadding=/"2/" id=/"table1/">
<tr>
<td width=/"15/" valign=/"top/" height=/"23/">
<img border=/"0/" src=/"images/qq_n01.gif/" width=/"16/" height=/"16/"></td>
<td valign=/"bottom/">
<script>document.write(/"<a target=blank href=tencent://message/?uin=251922268&Site=網頁特效&Menu=yes><img border=0 SRC=http://wpa.qq.com/pa?p=1:43486831:10 alt=[QQQQQ]></a>/");</script>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td>
</td>
</tr>
</table>
</td>
<td width=/"7/">
<img height=/"100/" src=/"images/qq_right.gif/" width=/"7/"></td>
</tr>
<tr>
<td colspan=/"3/">
<img height=/"30/" src=/"images/qq_bottom1.gif/" width=/"109/"></td>
</tr>
<tr>
<td colspan=/"3/">
<img height=/"33/" src=/"images/qq_logo.gif/" width=/"109/"></td>
</tr>
</table>
</div>
<script type=/"text/javascript/">
function FloatTop()
{
var startX1 =document.body.offsetWidth-125 ,startY1 = 5;
var startX2 =0,startY2 = 95;
var ns = (navigator.appName.indexOf(/"Netscape/") != -1);
var d = document;
function ml(id,startX,startY)
{
var el=d.getElementById?d.getElementById(id):d.all?d.all[id]:d.layers[id];
if(d.layers)el.style=el;
el.sP=function(x,y){this.style.left=x;this.style.top=y;};
el.x = startX;
el.y = startY;
return el;
}
window.stayTopLeft=function()
{
var pY = ns ? pageYOffset : document.body.scrollTop;
ftlObj.y += (pY + startY1 - ftlObj.y)/8;
ftlObj1.y += (pY + startY2 - ftlObj1.y)/8;
ftlObj.sP(document.body.scrollLeft+document.body.offsetWidth-125, ftlObj.y);
ftlObj1.sP(ftlObj1.x, ftlObj1.y);
setTimeout(/"stayTopLeft()/", 30);
}
// ftlObj = ml(/"divStay/",document.body.scrollLeft+document.body.offsetWidth-125,0);
// ftlObj1 = ml(/"divStayTopLeft/",0,30);
ftlObj = ml(/"divStay/",(document.body.scrollLeft+document.body.offsetWidth)/2+379,0);
ftlObj1 = ml(/"divStayTopLeft/",(document.body.scrollLeft+document.body.offsetWidth)/2+379,30);
stayTopLeft();
}
FloatTop();
</script>
</body>
</html>
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希望本文所述對大家JavaScript程序設計有所幫助。