function rollmenu(menu,ide,typ){
  if(typ == "1"){
    document.getElementById(menu).style.visibility = 'visible';
    document.getElementById(ide).style.color = '#D82818';
  }
  else if(typ == "2"){
    document.getElementById(menu).style.visibility = 'visible';
    document.getElementById(ide).style.visibility = 'visible';
  }
  else if(typ == "3"){
    document.getElementById(menu).style.visibility = 'hidden';
    document.getElementById(ide).style.color = '#281868';
  }
  else if(typ == "4"){
    document.getElementById(menu).style.visibility = 'hidden';
    document.getElementById(ide).style.visibility = 'hidden';
  }
}

 function open_obrwin(obr,sir,vys,pop){
   if(sir > screen.width){
     vys = (vys/sir) * screen.width;
     sir = screen.width;
   }
   if(vys > screen.height){
     sir = (sir/vys) * screen.height;
     vys = screen.height;
   }
   var sirobr = sir - 5;
   var vysobr = vys - 15;
   if(screen.width - sir > 100) lev = 100;
   else lev = 0;
   if(screen.height - vys > 100) hor = 100;
   else hor = 0;
   var okynko = window.open('zobr_obr.php?obr='+obr+'&sir='+sirobr+'&vys='+vysobr+'&pop='+pop+'','obrwin','width='+sir+', height='+vys+' ,left='+lev+' ,top='+hor);
   okynko.focus();
 }

 function get_open_obrwin(ide){
   var obr = document.getElementById("o"+ide).value;
   var sir = document.getElementById("s"+ide).value;
   var vys = document.getElementById("v"+ide).value;
   var pop = document.getElementById("p"+ide).value;

   open_obrwin(obr,sir,vys,pop);
 }

 function set_open_obrwin(ideset,ideget){
   document.getElementById("src"+ideset).src = document.getElementById("src"+ideget).src;
   document.getElementById("o"+ideset).value = document.getElementById("o"+ideget).value;
   document.getElementById("s"+ideset).value = document.getElementById("s"+ideget).value;
   document.getElementById("v"+ideset).value = document.getElementById("v"+ideget).value;
   document.getElementById("p"+ideset).value = document.getElementById("p"+ideget).value;
 }

 function zobr_cenu(cena,typ){
   if(typ == "dar"){
     document.getElementById('cena').value = cena+",--";
   }
   else{
     document.getElementById('doplatek').value = cena+",--";
   }
 }

 function open_scrwin(str){
   sir = screen.width;
   vys = screen.height;

   var scrokynko = window.open(str,'scrokynko','width='+sir+', height='+vys+', scrollbars=yes');
   scrokynko.focus();
 }

 function tisk(){
   if(document.getElementById('skryt')){ document.getElementById('skryt').style.visibility = 'hidden'; }
   if(document.getElementById('tisk')){ document.getElementById('tisk').style.visibility = 'hidden'; }
   print();
   if(document.getElementById('skryt')){ document.getElementById('skryt').style.visibility = 'visible'; }
   if(document.getElementById('tisk')){ document.getElementById('tisk').style.visibility = 'visible'; }
 }

 function doba_letu(){
   var dobaletu = document.getElementById('doba').value;
   var sel = document.getElementById('letadlo');
   var letoun = sel.options[sel.selectedIndex].value;
   if(letoun == "akrobacie Letoun Zlín Z-142"){
     var mindoba = 10;
   }
   else{
     var mindoba = 15;
   }

   if(dobaletu >= mindoba){
     var mod = dobaletu % 5;
     var div = dobaletu / 5;
     if(mod != 0){
       dobaletu = 5*(Math.round(div));
       document.getElementById('doba').value = dobaletu;
     }
   }
   else{
     document.getElementById('doba').value = 15;
   }
 }

 function vyp_cenu(){
   var let = new Array();
   let[0] = "Letoun Zlín Z-126";
   let[1] = "Letoun Zlín Z-142";
   let[2] = "Motorový kluzák L-13SW Vivat";
   let[3] = "Letoun Zlín Z-43";
   let[4] = "Antonov AN-2";
   let[5] = "L-410 UVP Turbolet";
   let[6] = "akrobacie Letoun Zlín Z-142";

   var clt = new Array();
   clt[0] = 60;
   clt[1] = 80;
   clt[2] = 40;
   clt[3] = 32;
   clt[4] = 20;
   clt[5] = 500/30;
   clt[6] = 150;

   var sel = document.getElementById('letadlo');

   for(i = 0 ; i < clt.length ; i++){
     if(sel.options[sel.selectedIndex].value == let[i]){
       var cenaletu = clt[i];
       break;
     }
   }

   var dobaletu = document.getElementById('doba').value;
   var celcena = dobaletu * cenaletu;
   celcena = 10*(Math.round(celcena / 10));

   document.getElementById('cena').value = celcena+",--";   
 }

function pridobr(){
  var pocet = document.getElementById('pocobr').value;
  var divid = "obr"+pocet;

  var newpocet = parseInt(pocet)+1;
  if(newpocet < 10) var mez = "&nbsp; ";
  else mez = "";

  var newobr = mez+newpocet+". <INPUT type=file name=obr["+pocet+"] size=46 id=file"+pocet+">";

  var newdivid = "obr"+newpocet;

  newobr += "</DIV><DIV id="+newdivid+">";

  document.getElementById(divid).innerHTML = newobr;

  document.getElementById('pocobr').value = newpocet;
}

function invcheck(fname){
   var f = document.getElementById(fname);
   var e = f.elements;
   for(i = 0 ; i < e.length ; i++){
     if(e[i].type == "checkbox"){
       if(e[i].checked == true) e[i].checked = false;
       else e[i].checked = true;
     }
   }
}