function ShowShema1 () {
      var src;
      src='ok-shema-1.html';
      window.open(src,'cultura1','toolbar=0,location=0,status=0,menubar=0,scrollbars=1,resizable=1,width=750,height=550');
      }
	  function ShowShema2 () {
      var src;
      src='ok-shema-2.html';
      window.open(src,'cultura2','toolbar=0,location=0,status=0,menubar=0,scrollbars=1,resizable=1,width=534,height=550');
      }
	  function ShowShema3 () {
      var src;
      src='ok-shema-3.html';
      window.open(src,'cultura3','toolbar=0,location=0,status=0,menubar=0,scrollbars=0,resizable=0,width=621,height=381');
      }
	   function ShowShema4 () {
      var src;
      src='operetta_theatre_plan.html';
      window.open(src,'cultura4','toolbar=0,location=0,status=0,menubar=0,scrollbars=0,resizable=0,width=325,height=448');
      }