anchor.diff:    $j('#seconds_per_column,#maximum_columns').keyup(function(event) {
       var CARRIAGE_RETURN = 13;
       if (event.keyCode === CARRIAGE_RETURN) {
  -      $cd.postTo('/dashboard/show', {
  -        id: "<%= @kata.id %>",
  -        seconds_per_column: secondsPerColumn(),
  -        maximum_columns: maximumColumns()        
  -      });
  +      $cd.postTo('/dashboard/show', params());
       }
     });
     
  
positive.code: 
  $j(document).ready(function() {
  
    var parseInput = function(name, current_value) {
      var input = $j('#' + name);
      var newValue = parseInt(input.val());
      if (isNaN(newValue)) {
  
negative.code:     return input.val();
    };
  
    var params = function() {
      return {
        id: "<%= @kata.id %>",
        seconds_per_column: parse('seconds_per_column', <%= @seconds_per_column %>),
        maximum_columns: parse('maximum_columns', <%= @maximum_columns %>)
      };
    };
    
    var refreshDashboard = function() {
      $j.ajax({
        url: "<%= url_for :action => 'heartbeat' %>",
        data: params(),
        dataType: "script"
      });
    };
  