ref="#responseTimeDistribution" onClick="checkAll('choicesResponseTimeDistribution');">Display all samples</a>
                                        </li>
                                        <li><a href="#responseTimeDistribution" onClick="uncheckAll('choicesResponseTimeDistribution');">Hide all samples</a>
                                        </li>
                                        <li><a href="#responseTimeDistribution" onclick="exportToPNG('flotResponseTimeDistribution', this);">Save as PN