function Czysc(obj)

{

  if (obj.value == '0')

  {

    obj.value = '';

  };

}



function SprawdzLiczba(obj)

{

  var re = new RegExp('^[0-9]{1,2}$');

  

  if(obj.value.match(re))

  {

    exit();

  }

  else

  {

    if (obj.value == '')

    {

      obj.value = '0';

    }

    else

    {

      obj.value = '0';

      if (lang == 'pl')

  	  {

  		  alert('Wpisana wartość musi być liczbą z zakresu 0-99');

  		}

  		else

  		{

        alert('Inscribed value has to be the number from the range of 0-99');

      }

    }

  }

}



function SprawdzEmail()

{

	if (document.getElementById('form_email').value.search(/^[a-z0-9_.-]+([_\\.-][a-z0-9]+)*@([a-z0-9_\.-]+([\.][a-z]{2,4}))+$/i))

	{

		return false;

	}

	else

	{

		return true;

	}

}



function checkForm() {

	var blad = false;

	

	if (document.getElementById('form_nazwa').value == '')

	{

		document.getElementById('form_nazwa').className = "inputzle";

		blad = true;

	}

	else

	{

		document.getElementById('form_nazwa').className = "input";

	}

	

	if (document.getElementById('form_miasto').value == '')

	{

		document.getElementById('form_miasto').className = "inputzle";

		blad = true;

	}

	else

	{

		document.getElementById('form_miasto').className = "input";

	}

	

	if (document.getElementById('form_telefon').value == '')

	{

		document.getElementById('form_telefon').className = "inputzle";

		blad = true;

	}

	else

	{

		document.getElementById('form_telefon').className = "input";

	}

	

	if (SprawdzEmail())

	{

		document.getElementById('form_email').className = "input";

	}

	else

	{

		document.getElementById('form_email').className = "inputzle";

		blad = true;

	}

	

	

	if (blad == true)

	{

	  if (lang == 'pl')

	  {

		  alert ("Wypełnij poprawnie wszystkie wymagane pola!");

		}

		else

		{

      alert("Please, fill properly all required fields");

    }

		return false;

	}

	else

	{

    return true;

	}

}





function checkForm2() {

	var blad = false;

	

	if (document.getElementById('form_nazwa').value == '')

	{

		document.getElementById('form_nazwa').className = "inputzle";

		blad = true;

	}

	else

	{

		document.getElementById('form_nazwa').className = "input";

	}

	

	if (document.getElementById('form_telefon').value == '')

	{

		document.getElementById('form_telefon').className = "inputzle";

		blad = true;

	}

	else

	{

		document.getElementById('form_telefon').className = "input";

	}

	

	if (document.getElementById('form_tresc').value == '')

	{

		document.getElementById('form_tresc').className = "inputzle";

		blad = true;

	}

	else

	{

		document.getElementById('form_tresc').className = "input";

	}

	

	if (blad == true)

	{

		if (lang == 'pl')

	  {

		  alert ("Wypełnij poprawnie wszystkie wymagane pola!");

		}

		else

		{

      alert("Please, fill properly all required fields");

    }

		return false;

	}

	else

	{

    return true;

	}

}