Thanks everyone who helped me.
I now understand it.

Thanks a lot.

S pozdravom 

 /-------------------------------------------------------------------\
{   Jan 'EIS' Satko        Slovenska Polnohospodarska Univerzita      }
 }   administrator       Centrum Vypoctovej Techniky a Informatiky   {
{    satko@spu.sk        Tr. A. Hlinku 2, 949 01, Nitra, Slovensko    }
 \-------------------------------------------------------------------/