function Show(object)
{
   object.style.display='block';
}

function Hide(object)
{
   object.style.display='none';  
}


function obrazek(imgsrc,xx,yy,nazev)
{
   var NewWin;
   xxw=xx+40; 
   yyh=yy+50;
   
   if(NewWin != null)
   {
     NewWin.close();
   }
   
   NewWin = window.open("","galery","scrollbars,location=no,directories=no,status=no,menubar=no,toolbar=no,resizable=yes,top=20,left=20,width="+xxw+",height="+yyh+"");
   NewWin.resizeTo(xxw+20,yyh+20);
   NewWin.document.open();
   imgsrc='"'+imgsrc+'"';
   NewWin.document.writeln("<title>VELBON.CZ</title><body style=\"background-color: #FFFFFF; margin:10px; 0 0 0; padding:0\"><div align=center><a href='javascript: self.close()'><img src="+imgsrc+" width="+xx+" height="+yy+" border='0' alt='"+nazev+" - kliknutím na obrázek zavřete okno'></a></div>");
   NewWin.focus(); 
   NewWin.document.close();
}


 // overeni pred vykonanim nejake akce
function CheckAction(msg)
{ 
  if(!confirm(msg)) return false;
  else return true;  
}


//MENU
function Tlacitko (zapnuty, vypnuty, sirka, vyska) 
  { this.zapniObr     = new Image (sirka, vyska);
    this.zapniObr.src = zapnuty;
    this.vypniObr     = new Image (sirka, vyska);
    this.vypniObr.src = vypnuty; }

function Zmena (zapnuto, obrazek) 
  { if ( zapnuto )
      this.document[obrazek].src = Tlacitko[obrazek].zapniObr.src;
    else
      this.document[obrazek].src = Tlacitko[obrazek].vypniObr.src; }

Tlacitko["uvod"] = new Tlacitko ( "images/menu/uvod-.jpg", "images/menu/uvod.jpg", 104, 35 );
Tlacitko["katalog"] = new Tlacitko ( "images/menu/katalog-.jpg", "images/menu/katalog.jpg", 107, 35 );
Tlacitko["aktuality"] = new Tlacitko ( "images/menu/aktuality-.jpg", "images/menu/aktuality.jpg", 98, 35 );
Tlacitko["nakoupit"] = new Tlacitko ( "images/menu/nakoupit-.jpg", "images/menu/nakoupit.jpg", 93, 35 );
Tlacitko["kontakt"] = new Tlacitko ( "images/menu/kontakt-.jpg", "images/menu/kontakt.jpg", 60, 35 );
Tlacitko["produkty"] = new Tlacitko ( "images/menu/produkty-.jpg", "images/menu/produkty.jpg", 140, 35 );


 // overeni pred vykonanim nejake akce
function CheckAction(msg)
{ 
  if(!confirm(msg)) return false;
  else return true;  
}

//odeslani formulare
function redir(form)
{
  x=form.menu.selectedIndex;
 adresa=form.menu[x].value;
 window.open(adresa,"_self");
}

