document.writeln("<div id=\"qqaddiv\" style=\"position:absolute; z-index: 100;\"> "); 
document.writeln("<a href=http://do.uslawchina.cn/letter/spo/><img src=images/top.gif border=0></a>"); 
document.writeln("</div>"); 
var bodyfrm = ( document.compatMode.toLowerCase()=="css1compat" ) ? document.documentElement : document.body; 
var adst = document.getElementById("qqaddiv").style; 
adst.top = ( bodyfrm.clientHeight - 76 ) + "px"; 
adst.left = ( bodyfrm.clientWidth - 31 ) + "px"; 
function moveR() { 
adst.top = ( bodyfrm.scrollTop + bodyfrm.clientHeight - 77 ) + "px"; 
adst.left = ( bodyfrm.scrollLeft + bodyfrm.clientWidth - 164 ) + "px"; 
} 
setInterval("moveR();", 80);