Jqplot图形仅在第一次提交时出现

$(\'#substat\').click(function() { 
    $.post(\'ext/engine.php\', post, function(data){
        $(\'#statout\').empty().append(data).dialog(
         {height:350, width:700, dialogClass: \'shadowme\', position: \'center\'})
        }); 
});

$html = \'<script>\';
for($s = 0; $s < $m; $s++) {
    if ($m-$s != 1) { $var1 .= $out[total][$s].\', \'; $var2 .= $out[age][$s].\'\", \"\'; }
    else { $var1 .= $out[total][$s]; $var2 .= $out[age][$s].\'\"\';}
    if ($out[total][$s] > $max) { $max = $out[total][$s]; }
}
if ($max > 10) { $max = round($max/10); }
$html .= \'VarH = [\'.$var1.\'];
    plot1 = $.jqplot(\"statout\", [VarH], {
                legend:{show:true, location:\"ne\"},
                title:\"Gente\",
                series:[ { label:\"VarH\", renderer:$.jqplot.BarRenderer } ],
                axes:{
                    xaxis:{ renderer:$.jqplot.CategoryAxisRenderer, ticks:[\'.$var2.\'] },
                    yaxis:{ min:0, tickInterval:\'.$max.\', autoscale: true }
                },
                seriesDefaults:{ lineWidth:5, rendererOptions: { barWidth:5, barMargin:5, barPadding:0 } }
            });
    </script>\';
echo $html;