HELP!! resolution checker and .css

[nlikens]

I used the resolution checker from here and it calls the appropriate .css for the visitors screen resolution. Works Great except it is pulling a graphic from my absolute postioned scrollable area to the bottom left when the coordinates in the .css say otherwise. Im stumped can someone help? Here is the link

http://www.travelinggrace.com/index_test.htm

[nlikens]

<style type="text/css">
#divUpControl{position:absolute; width:440; left:275; top:251; z-index:1; text-align: right}
#divDownControl{position:absolute; width:440; left:275; top:392; z-index:1; text-align: right}
#divContainer{position:absolute; width:440; height:140; overflow:hidden; top:253; left:235; clip:rect(0,440,170,0); visibility:hidden}
#divContent{position:absolute; top:0; left:0}
</style>