js跟随滚动条滚动浮动代码

复制代码代码如下:
var str="客服";
var objFT=new FloatT（"FloatMenu1",str,942,137,125,200,80,10）;
objFT.FloatRun（）;

//js跟随滚动条滚动浮动
//pObjName:html 元素ID
//pText:html 元素内容
//其它自己看
function FloatT（pObjName,pText,pstmnLEFT,pstmnGAP1,pstmnGAP2,pstmnBASE,pstmnActivateSpeed,pstmnScrollSpeed）
{
var FloatMenu;
var stmnLEFT = pstmnLEFT;
var stmnGAP1 = pstmnGAP1;
var stmnGAP2 = pstmnGAP2;
var stmnBASE = pstmnBASE;
var stmnActivateSpeed = pstmnActivateSpeed;
var stmnScrollSpeed = pstmnScrollSpeed;

this.FloatRun=function（pObjName）
{
var newDiv=document.createElement（"div"）;
newDiv.id=pObjName;
newDiv.innerHTML=pText;
newDiv.style.position="absolute";
document.body.appendChild（newDiv）;
FloatMenu=document.getElementById（pObjName）;
FloatMenu.style.display=="";
FloatMenu.style.top = document.documentElement.scrollTop + stmnBASE+"px";

FloatMenu.style.left = stmnLEFT+"px";
RefreshStaticMenu（）;
}

RefreshStaticMenu=function（）
{
var stmnStartPoint,stmnEndPoint,stmnRefreshTimer;

stmnStartPoint = parseInt（FloatMenu.style.top, 10）;
stmnEndPoint = document.documentElement.scrollTop + stmnGAP2;
if （stmnEndPoint < stmnGAP1） stmnEndPoint = stmnGAP1;

if（stmnStartPoint ！= stmnEndPoint）
{
stmnScrollAmount = Math.ceil（Math.abs（stmnEndPoint - stmnStartPoint） / 15 ）;
FloatMenu.style.top = parseInt（FloatMenu.style.top, 10） + （（stmnEndPoint<stmnStartPoint）？ -stmnScrollAmount : stmnScrollAmount）+"px";
stmnRefreshTimer = stmnScrollSpeed;
}
else
{
stmnRefreshTimer = stmnActivateSpeed;
}
setTimeout（"RefreshStaticMenu（）;", stmnRefreshTimer）;
}
}