[jQuery] weird 404 records in website statistics on jquery js file

Hi,
when I look at my website statistics (awstats), somehow I keep finding
these 404 records that point to:
/jquery-1.2.3.pack.js/eval/3DYR8yd%2Bmb25QTy058Fe3Q%3D%3D
or
/jquery-1.2.3.pack.js/
+sfgRmluamFuX1R5cGU9amF2YV9zY3JpcHQmRmluamFuX0xhbmc9dGV4dC9qYXZhc2NyaXB0+
Does anyone have an idea what this means?