// JavaScript Document
   var zmenasluzby = new Array('sluzby1', 'sluzby2', 'sluzby3', 'sluzby4', 'sluzby5');

        function prepnisluzby(id) {
          for (var i=0; i<zmenasluzby .length; i++) {
            document.getElementById(zmenasluzby [i]).style.display = (zmenasluzby [i] == id ? 'block' : 'none');
          }
          return false;
        }