function show1(){
   document.getElementById("roleta").style.visibility="visible";
   $test1=0;
   $test2=1;
}
function show2(){
   document.getElementById("roleta").style.visibility="visible";
   $test1=1;
}
function hide1(){
   window.setTimeout("hide3();", 400);
   $test2=0;
}
function hide2(){
   document.getElementById("roleta").style.visibility="hidden";
   $test2=0;
}
function hide3(){
   if($test1==0 && $test2==0){
      document.getElementById("roleta").style.visibility="hidden";
   }
}
function validate_napiste(){
   if(confirm("Chcete odeslat tuto zprávu?")){
      return true;
   }else{
       return false;
   }
}