code inside script in jsp is not getting refreshed at interval

i am using high chart for plotting dynamic graph . for this i am calling function to get the last data after 1000 ms . But the same code is shown on graph . alert also show the same data

code is

load: function() {

           var series = this.series[0];
                            setInterval(function() {          
               <% Livedynamicgraph l = new Livedynamicgraph(); %>                 
               var   x = <%out.println(l.gettime()); %> ;
                  alert(x)  
                  y = <%out.println(l.getresponsetime()); %>; 
                 series.addPoint([x, y], true, true); 
                       }, 1000);