Switching of markers on a plot.

HTML

<script language="javascript" type="text/javascript" src="https://bitbucket.org/cleonello/jqplot/raw/b5a7796a9ebf/src/jquery.jqplot.js"></script>
<script language="javascript" type="text/javascript" src="https://bitbucket.org/cleonello/jqplot/raw/b5a7796a9ebf/src/plugins/jqplot.dateAxisRenderer.js"></script>
<script language="javascript" type="text/javascript" src="https://bitbucket.org/cleonello/jqplot/raw/b5a7796a9ebf/src/plugins/jqplot.pointLabels.js"></script>
<div id="chart"></div>
<button id="click">Oi switch</button>

CSS

#chart {
    width: 100%;
    height: 100%;
}
//jquery.jqplot.css
/*rules for the plot target div.  These will be cascaded down to all plot elements according to css rules*/
 .jqplot-target {
    position: relative;
    color: #666666;
    font-family:"Trebuchet MS", Arial, Helvetica, sans-serif;
    font-size: 1em;
    /*    height: 300px;
    width: 400px;*/
}
/*rules applied to all axes*/
 .jqplot-axis {
    font-size: 0.75em;
}
.jqplot-xaxis {
    margin-top: 10px;
}
.jqplot-x2axis {
    margin-bottom: 10px;
}
.jqplot-yaxis {
    margin-right: 10px;
}
.jqplot-y2axis, .jqplot-y3axis, .jqplot-y4axis, .jqplot-y5axis, .jqplot-y6axis, .jqplot-y7axis, .jqplot-y8axis, .jqplot-y9axis, .jqplot-yMidAxis {
    margin-left: 10px;
    margin-right: 10px;
}
/*rules applied to all axis tick divs*/
 .jqplot-axis-tick, .jqplot-xaxis-tick, .jqplot-yaxis-tick, .jqplot-x2axis-tick, .jqplot-y2axis-tick, .jqplot-y3axis-tick, .jqplot-y4axis-tick, .jqplot-y5axis-tick, .jqplot-y6axis-tick, .jqplot-y7axis-tick, .jqplot-y8axis-tick, .jqplot-y9axis-tick, .jqplot-yMidAxis-tick {
    position: absolute;
    white-space: pre;
}
.jqplot-xaxis-tick {
    top: 0px;
    /* initial position untill tick is drawn in proper place */
    left: 15px;
    /*    padding-top: 10px;*/
    vertical-align: top;
}
.jqplot-x2axis-tick {
    bottom: 0px;
    /* initial position untill tick is drawn in proper place */
    left: 15px;
    /*    padding-bottom: 10px;*/
    vertical-align: bottom;
}
.jqplot-yaxis-tick {
    right: 0px;
    /* initial position untill tick is drawn in proper place */
    top: 15px;
    /*    padding-right: 10px;*/
    text-align: right;
}
.jqplot-yaxis-tick.jqplot-breakTick {
    right: -20px;
    margin-right: 0px;
    padding:1px 5px 1px 5px;
    /*    background-color: white;*/
    z-index: 2;
    font-size: 1.5em;
}
.jqplot-y2axis-tick, .jqplot-y3axis-tick, .jqplot-y4axis-tick, .jqplot-y5axis-tick, .jqplot-y6axis-tick, .jqplot-y7axis-tick, .jqplot-y8axis-tick,...

JavaScript

jQuery(document).ready(function () {
    var data = [
        [1, 1],
        [2, 5],
        [4, 9]
    ];
    var graph;
    var isShowPointLabels = true;

    function makePlot(showPointLabels) {
        graph = $.jqplot("chart", [data], {
            series: [{
                pointLabels: {
                    show: showPointLabels
                }
            }]
        });
    }
    makePlot(isShowPointLabels);
    $("#click").click(function () {
        isShowPointLabels = !isShowPointLabels;
        makePlot(isShowPointLabels);
        graph.replot();
    });
});