function sprawdz(id)
{
 if (navigator.appName=="Microsoft Internet Explorer") { 
    if (document.all[id].style.visibility == 'visible') {
          document.all[id].style.visibility = 'hidden';
          document.all[id].style.display = 'none';
      }
    else {
       document.all[id].style.visibility = 'visible';
       document.all[id].style.display = 'block';
      }
 }
 else { 
  
    if (document.getElementById(id).style.visibility == 'visible') {
          document.getElementById(id).style.visibility = 'hidden';
          document.getElementById(id).style.display = 'none';
      }
    else {
       document.getElementById(id).style.visibility = 'visible';
       document.getElementById(id).style.display = 'block';
      }
 }
}

function wstawobiektflashVARS(nazwa,szerokosc,wysokosc,idfvars)
{
document.write('<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,0,0" width="'+szerokosc+'" height="'+wysokosc+'" id="testNaStr" align="middle">');
document.write('<param name="allowScriptAccess" value="sameDomain" />');
document.write('<param name="movie" value="'+nazwa+'" />');
document.write('<param name="quality" value="high" />');
document.write('<param name="wmode" value="transparent" />');
document.write('<param name="flashvars" value="lang='+idfvars+'" />');
document.write('<param name="bgcolor" value="#FECD12" />');
document.write('<embed wmode="transparent" flashvars="lang='+idfvars+'" src="'+nazwa+'" quality="high" bgcolor="#FECD12" width="'+szerokosc+'" height="'+wysokosc+'" name="testNaStr" align="middle" allowScriptAccess="sameDomain" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />');
document.write('</object>');
}

function wstawobiektflash(nazwa,szerokosc,wysokosc)
{
document.write('<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,0,0" width="'+szerokosc+'" height="'+wysokosc+'" id="testNaStr" align="middle">');
document.write('<param name="allowScriptAccess" value="sameDomain" />');
document.write('<param name="movie" value="'+nazwa+'" />');
document.write('<param name="quality" value="high" />');
document.write('<param name="wmode" value="transparent" />');
document.write('<param name="bgcolor" value="#ffffff" />');
document.write('<embed wmode="transparent" src="'+nazwa+'" quality="high" bgcolor="#ffffff" width="'+szerokosc+'" height="'+wysokosc+'" name="testNaStr" align="middle" allowScriptAccess="sameDomain" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />');
document.write('</object>');
}

function checkform (form){

if (form.email.value=='') 
 {
   alert("Proszę podać adres e-mail!");
   return false;
 }
if(form.email.value!=''){
    var wzor_adres = /^([\w\.+_\-]+)@([\w\.\-_]+)\.([a-z]{2,6})$/; 
    var str_adres = form.email.value; 
    if(!(wzor_adres.test(str_adres))){
      alert('"' + str_adres + '" to nie jest poprawny adres e-mail!');
      return false;
    }
 }
if (form.tresczapytania.value=='') 
 {
   alert("Proszę wpisać treść wiadomości!");
   return false;
 }
if(form.zgoda.checked==false){
   alert("Proszę wyrazić zgodę na przetwarzanie danych osobowych!");
   return false;
 }

}