$(function(){
		$(initGraphs(100));
		$("#reloadButton").click(function(){initGraphs($("input[name=\"pocet\"]:checked").val())});
    });
    </script>
   <div>
   <input type=button onclick="history.back()" value="Zpět">

   <input type="radio" name="pocet" value="100" checked>Den
   <input type="radio" name="pocet" value="300">3
   ......
   <input type="submit" id="reloadButton" value="Refresh">