function write_mhref(user, domain, text)
   {
   var at = '@';
   var mail = user + at + domain;
   document.write("<a href='mailto:" + mail + "' title='Napisz do nas'>" + ( text == undefined ? mail : text ) + "</a>");
   }
function remove_loading()
   {
   document.getElementById('overlay').style.display='none';
   document.getElementById('overlay').style.visibility='hidden';
   document.getElementById('loader_container').style.display='none';
   document.getElementById('loader_container').style.visibility='hidden';
   document.getElementById('podglad_container').style.display='none';
   document.getElementById('podglad_container').style.visibility='hidden';
   }
function valid_zapytanie(mailInput,trescInput)
   {
   Wzor=/^[0-9a-zA-Z.]+\@[0-9a-zA-Z]+\.[0-9a-zA-Z.]+$/;
   OK=(Wzor.test(mailInput.value)==true && mailInput.value.length!=0);
   if(!OK) { alert( 'Nieprawidłowy adres e-mail' ); return;}
   if(trescInput.value.length <= 5) { alert( 'Treść wiadomości powinna być dłuższa niż 5 znaków' ); return;}
   document.zapytaj_zapytanie.submit();
   }
function otworzZdjecie(ID,X,Y)
   {
   var winl = (screen.width - X) / 2;
   var wint = (screen.height - Y) / 2;
   window.open("popup.php?uid="+ID,"photos"+ID,"toolbar=no,directories=no,width="+X+",height="+Y+",status=no,scrollbars=no,resizable=yes,menubar=no,top="+wint+",left="+winl+"");
   }
function podglad_loading(szer,wys,id)
   {
   document.getElementById('overlay').style.display='';
   document.getElementById('overlay').style.visibility='';
   document.getElementById('podglad_container').style.display='';
   document.getElementById('podglad_container').style.visibility='';
   document.getElementById('podglad').style.width=szer+'px';
   document.getElementById('podglad').style.height=(wys+20)+'px';
   document.getElementById('podglad_image').src='images/'+id+'_c.jpg';
   }