function hledej()
{
var adresa;
var CoNajit=document.formular.internet.value;
var vybrane=document.formular.nabidka.selectedIndex;

switch (vybrane){
case 0: adresa="http://search.seznam.cz/cgi/hledej.cgi?string="+CoNajit +"&co=seznam";
break;

case 1: adresa="http://search.centrum.cz/index.php?q="+CoNajit+"&sec=kat&x=26&y=12";
  break;

case 2: adresa="http://www.altavista.com/cgi-bin/query?q="+CoNajit+"&kl=XX&pg=q&Translate=on&search.x=27&search.y=7";
break;

case 3: adresa="http://search.yahoo.com/bin/search?p="+CoNajit;
break;
}
okno=window.open(adresa,"vysledek");
}