$(document).ready(function () {

  // set up plot
  $.jqplot.config.enablePlugins = true;

  s1 = [['23-May-08',1],['24-May-08',4],['25-May-08',2],['26-May-08', 6]];

  plot1 = $.jqplot('chart1',[s1],{
     title: 'Highlighting, Dragging, Cursor and Trend Line',
     axes: {
         xaxis: {
             renderer: $.jqplot.DateAxisRenderer,
             tickOptions: {
                 formatString: '%#m/%#d/%y'
             },
             numberTicks: 4
         },
         yaxis: {
             tickOptions: {
                 formatString: '$%.2f'
             }
         }
     },
     highlighter: {
         sizeAdjust: 10,
         tooltipLocation: 'n',
         tooltipAxes: 'y',
         tooltipFormatString: '<b><i><span style="color:red;">hello</span></i></b> %.2f',
         useAxesFormatters: false
     },
     cursor: {
         show: true
     }
  });

  // add our hook, to fire after a series update
  $.jqplot.postDrawSeriesHooks.push(updatedSeries);

  function updatedSeries(sctx, options) {
    console.log(plot1.series[0].data); //data for the series is here
  }

});

[
Array[2]
,
Array[2]
,
Array[2]
,
Array[2]
]

$("#chart1").on("jqplotClick", function(ev, gridpos, datapos, neighbor) {
    if ( neighbor ) {
        // specific point that has been clicked
        console.log('x:' + neighbor.data[0] + ' y:' + neighbor.data[1]);
    }
    // all the data from this plot's single series
    console.log(plot1.series[0].data);
});

var plots = [
    $.jqplot('chart1', [s0], graph_opts),
    $.jqplot('chart2', [s1], graph_opts)
];
$("#chart1, #chart2").on("jqplotClick", function(ev, gridpos, datapos, neighbor) {
    var data = [];
    $.each(plots, function(key, plot) {
        data[key] = plot.series[0].data;
    });

    var ajax_opts = {
        url:      ajax_info.url,
        type:     'post',
        async:    true,
        cache:    false,
        dataType: 'json',
        data: {
            action:  'store_graphs',
            data:    data
        },
        success: function( response ) {
            console.log(response);
        },
        error: function( xhr, textStatus, e ) {
            console.log(xhr.responseText);
        }
    };
    $.ajax(ajax_opts);
});