function aktywuj(tabela)
{if(tabela=='tabela_01')
{document.getElementById('tabela_01').style.display='';document.getElementById('tabela_02').style.display='none';document.getElementById('a_1').className='active';document.getElementById('a_2').className='';document.getElementById('ekstraklasa').style.display='';document.getElementById('mesa').style.display='none';document.getElementById('a_3').className='active';document.getElementById('a_4').className='';document.getElementById('tabela_04').style.display='none';document.getElementById('tabela_03').style.display='none';}
if(tabela=='tabela_02')
{document.getElementById('tabela_01').style.display='none';document.getElementById('tabela_02').style.display='';document.getElementById('a_1').className='';document.getElementById('a_2').className='active';document.getElementById('ekstraklasa').style.display='none';document.getElementById('mesa').style.display='';document.getElementById('a_6').className='';document.getElementById('a_5').className='active';document.getElementById('tabela_04').style.display='none';document.getElementById('tabela_03').style.display='none';}
if(tabela=='tabela_03')
{document.getElementById('tabela_01').style.display='none';document.getElementById('tabela_03').style.display='';document.getElementById('a_3').className='';document.getElementById('a_4').className='active';}
if(tabela=='tabela_04')
{document.getElementById('tabela_02').style.display='none';document.getElementById('tabela_04').style.display=''
document.getElementById('a_3').className='active';document.getElementById('a_6').className='active';document.getElementById('a_5').className='';}}