function showloginform()
   {
    document.getElementById('loginform').style.display = 'block';
    document.getElementById('screen').style.display = 'block';
   }

  function hideloginform()
   {
    document.getElementById('loginform').style.display = 'none';
    document.getElementById('screen').style.display = 'none';
   }


  function auth(){
    logi = document.pbc_auth.login.value;
    passw = document.pbc_auth.password.value;

    if(document.pbc_auth.remember.checked == 1){
      var to = 5*365*24*60*60*1000;
      var expDate = new Date();
      expDate.setTime(expDate.getTime() + to);
      document.cookie = "pbc_login = " + logi + "; path=/; expires=" + expDate.toGMTString();
      document.cookie = "pbc_pass = " + passw + "; path=/";
      document.cookie = "pbc_reme = 1; path=/";
    }else{
      document.cookie = "pbc_login = " + logi + "; path=/";
      document.cookie = "pbc_pass = " + passw + "; path=/";
    }

    location.reload();
    return false;
  }

  function logout(){
    document.cookie = "pbc_login =; path=/";
    document.cookie = "pbc_pass =; path=/";
    document.cookie = "pbc_auth =; path=/";
    
    location.reload();
  }