导航菜单静止不动，就象浮在页面上一样

<SCRIPT LANGUAGE="JavaScript">
function setVariables() {
imgwidth=235;
imgheight=19;
if (navigator.appName == "Netscape") {
horz=".left";
vert=".top";
docStyle="document.";
styleDoc="";
innerW="window.innerWidth";
innerH="window.innerHeight";
offsetX="window.pageXOffset";
offsetY="window.pageYOffset";
}
else {
horz=".pixelLeft";
vert=".pixelTop";
docStyle="";
styleDoc=".style";
innerW="document.body.clientWidth";
innerH="document.body.clientHeight";
offsetX="document.body.scrollLeft";
offsetY="document.body.scrollTop";
   }
}
function checkLocation() {
objectXY="branding";
var availableX=eval(innerW);
var availableY=eval(innerH);
var currentX=eval(offsetX);
var currentY=eval(offsetY);
x=availableX-(imgwidth-180)+currentX;
y=availableY-(imgheight+20)+currentY;
evalMove();
setTimeout("checkLocation()",10);
}
function evalMove() {
eval(docStyle + objectXY + styleDoc + horz + "=" + x);
eval(docStyle + objectXY + styleDoc + vert + "=" + y);
}
</script>
<div id="branding" style="position:absolute; visibility:show; left:435px; top:50px;">
<table width=10 bgcolor=#ffffff><td align=right>
<a href="www.3lian.com" onmouseover="window.status='3lian素材;return true" onmouseout="window.status='';return true"><img src="photo/c8.gif" width="16" height="21" border="0"></a></font></td>
</table>
</div>