function rel_art(numer,idk,kat){
	
	var url = "ajax.php?mod=artykuly&action=relative&id=" + numer +'&start='+ idk+'&kat='+ kat+'&dem=r' ;
	new Ajax.Request(url, {
	  method: 'get',
	  onSuccess: function(transport) {
  	
	  	Effect.Appear('relart');
		   $('relart').innerHTML = transport.responseText;
		}
		
	});
 
}