1、準備一張二維碼圖片，大小、圖片自己定義我這里用的寬度和高度都是253，名稱weixin.jpg
<!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=gb2312" /><title>二維碼圖片固定在右下角某處并跟隨滾動條滾動</title></head><body><div style="width:1000px; height:1000px;">二維碼圖片固定在右下角某處并跟隨滾動條滾動</div><script language="javascript">function wx_scroll(){ var topH=-80; var leftW=10; var sHeight,sWidth,cHeight; //alert(document.documentElement.clientWidth); (document.body.scrollLeft==0)?sWidth=document.documentElement.scrollLeft + document.documentElement.clientWidth - 260 :sWidth=document.body.scrollLeft+ document.documentElement.clientWidth - 260 ; (document.body.scrollTop==0)?sHeight=document.documentElement.scrollTop+ document.documentElement.clientHeight - 260 :sHeight=document.body.scrollTop+ document.documentElement.clientHeight - 260; document.getElementById("bar_float").style.left=eval(sWidth+leftW) +"px"; document.getElementById("bar_float").style.top=eval(sHeight+topH) +"px";}setInterval("wx_scroll()",100);</script><div id="bar_float" style="position: absolute; display:block; z-index: 10000; left: 1216px; top: -80px;"><div id="stayTopleft"> <table cellspacing="0" cellpadding="0" border="0"> <tbody> <tr> <td colspan="2" valign="top"><img src="weixin.jpg" width="253" height="253" border="0"></td> </tr> <tr> </table></div></div></body></html>
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