top.js

来自「模块及功能： 1.汽车新闻 分类.查询.翻页 2.出售信息 搜索.评」· JavaScript 代码 · 共 14 行

//www.byshop.cn.
suspendcode="<DIV id=backi style='right:30px;POSITION:absolute;TOP:250px;'><a href='javascript:scroll(0,0)' ><img border=0 src=Images/top.gif title='顶部'></a><br><a href='javascript:scroll(0,500)' ><img border=0 src=Images/uw.gif title='中部'></a><br><a href='javascript:scroll(0,80000)' ><img border=0 src=Images/Cnext.gif title='底部'></a></div>" 
document.write(suspendcode); 
lastScrollY=0; 
function heartBeat(){ 
diffY=document.body.scrollTop; 
percent=.1*(diffY-lastScrollY); 
if(percent>0)percent=Math.ceil(percent); 
else percent=Math.floor(percent); 
document.all.backi.style.pixelTop+=percent; 
lastScrollY=lastScrollY+percent; 
} 
window.setInterval("heartBeat()",1);