<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>两侧广告条幅</title> <style type="text/css"> *{padding:0px;margin:0px;} #ad,#ad1{background:#09F;} </style> </head> <body > <div id="ad" style="141px;height:218px;position:absolute;background:#09F;"> </div> <div id="ad1" style="141px;height:218px;position:absolute;right:0px;background:#09F;"> </div> <div id="time" style="background:#999; height:2000px;"> </div> <script type="text/javascript"> var s=0; function change(){ //alert(bodyScroll) var bodyScroll=document.documentElement.scrollTop h=Math.ceil(0.1*(bodyScroll-s)); s=h+s; document.getElementById("ad").style.top=100+s+"px" document.getElementById("ad1").style.top=100+s+"px" } function off(){ document.getElementById("ad").style.display="none"; } function off1(){ document.getElementById("ad1").style.display="none"; } setInterval("change()",10) </script> </body> </html>