图形永远在下方

;
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+30)+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>
                  <script language=JavaScript>
<!--Hide from non JavaScript browsers
an = 3
var ran = Math.random();
var talet = Math.round(ran * (an-1))+1;
function create() {
        this.src = ''
	
}

b = new Array()
for(var i=1; i<=an; i++) { b[i] = new create() }

b[1].src    = "'http://