function pokaz_biu_news(parametr){



           if(parametr=='b')

		     { 
        	   if(document.getElementById('link_biuletyn'))
                   document.getElementById('link_biuletyn').className='baspa'
        	   
			 document.getElementById('link_newsletter').className='baspu'
			 
			 document.getElementById('link_doradca').className='baspu'

				if (document.getElementById('show_biuletyn'))
			 document.getElementById('show_biuletyn').style.display ='';

		     document.getElementById('show_newsletter').style.display ='none';
			 
			 document.getElementById('show_doradca').style.display ='none';

			 }



			if(parametr=='n')

		     { 
				if(document.getElementById('link_biuletyn'))
				   document.getElementById('link_biuletyn').className='baspu'

			 document.getElementById('link_newsletter').className='baspa'
			 
			 document.getElementById('link_doradca').className='baspu'

				 if (document.getElementById('show_biuletyn'))
			          document.getElementById('show_biuletyn').style.display ='none';

		     document.getElementById('show_newsletter').style.display ='';
			 
			 document.getElementById('show_doradca').style.display ='none';

			 }
			 
			 if(parametr=='d')

		     { 
				 if(document.getElementById('link_biuletyn'))
			      document.getElementById('link_biuletyn').className='baspu'

			 document.getElementById('link_newsletter').className='baspu'
			 
			 document.getElementById('link_doradca').className='baspa'
			 
				 if (document.getElementById('show_biuletyn'))
			        document.getElementById('show_biuletyn').style.display ='none';

		     document.getElementById('show_newsletter').style.display ='none';
			 
			 document.getElementById('show_doradca').style.display ='';

			 }

}