function show(id)
{
  if ( document.getElementById(id).style.display=="block")
    document.getElementById(id).style.display="none";
  else document.getElementById(id).style.display="block";
}

function forum_show(id, img_id)
{
  if ( document.getElementById(id).style.display=="block"){
	  document.getElementById(img_id).src = "img/tlacitka/forum_rozbal_1.png"; 
    document.getElementById(id).style.display="none";
		} else { 
	  document.getElementById(id).style.display="block";
		document.getElementById(img_id).src = "img/tlacitka/forum_rozbal_2.png";
	}
}

function change_image_on(img_src, img_src2)
{
    document.getElementById(img_src).src = img_src2;
}

function change_image_out(img_src2, img_src)
{
    document.getElementById(img_src2).src = img_src;
}

function hlasuj(i)
{  
  var anketa="ank"+i;  
  document.getElementById(anketa).submit();  
}

function form_submit(i)
{
  var change=i;  
  document.getElementById(change).submit();
}

function form_change(i)
{
  var change="form_change_"+i;
  document.getElementById(change).submit();
}

function form_check_submit(i,nick,email,text,name,surname,street,city,psc,tel,count,order,agree)
{
  var change=i;
  if (change == "guestbook_form")
  {
    if (document.getElementById(nick).value == "")
    { 
      alert("Nevyplnili ste prezývku.");
      return false;
    }
    else if (document.getElementById(email).value == "")
    { 
      alert("Nevyplnili ste e-mail.");
      return false;
    }
    else if (document.getElementById(text) == "")
    { 
      alert("Nenapísali ste otázku.");
      return false;
    }  
    else document.getElementById(change).submit();
  }
  else if (change == "buy_form")
  {
    if (document.getElementById(name).value == "")
    { 
      alert("Nevyplnili ste meno.");
      return false;
    }
    else if (document.getElementById(surname).value == "")
    { 
      alert("Nevyplnili ste priezvisko.");
      return false;
    }
    else if (document.getElementById(street).value == "")
    { 
      alert("Nevyplnili ste ulicu.");
      return false;
    }
    else if (document.getElementById(city).value == "")
    { 
      alert("Nevyplnili ste mesto.");
      return false;
    }
    else if (document.getElementById(psc).value == "")
    { 
      alert("Nevyplnili ste PSČ.");
      return false;
    }
    else if (document.getElementById(email).value == "")
    { 
      alert("Nevyplnili ste e-mail.");
      return false;
    }
    /*else if (document.getElementById(count).value == "")
    { 
      alert("Nevyplnili ste prezívku.");
      return false;
    }*/
    else if (!document.getElementById(order).checked)
    { 
      alert("Nepotvrdili ste záväznú objednávku.");
      return false;
    }
    else if (!document.getElementById(agree).checked)
    { 
      alert("Nesúhlasili ste s obchodnými podmienkami.");
      return false;
    }            
    else document.getElementById(change).submit();  
  } 
}