$(document).ready(function() {
        var mydigits= function(node)  {
        // extract data from markup and return it
         var s=node.innerHTML;
        return s.replace(/,/g, "");
        }
        $(function() {
        $("#{$chart_id}_table").tablesorter( {
                textExtraction:mydigits
                })
        });
});

$(function() {
$("table").tablesorter( {

headers:{
3:{sorter:'commaDigit'}//3 referin to the header number
}
)
});
});

And it isn't working. Here's my whole JS file if you don't mind telling me what I'm doing wrong (Thanks a ton):

$(document).ready(function() {

jQuery.tablesorter.addParser({
  id: "commaDigit",
  is: function(s, table) {
    var c = table.config;
    return jQuery.tablesorter.isDigit(s.replace(/,/g, ""), c);
  },
  format: function(s) {
    return jQuery.tablesorter.formatFloat(s.replace(/,/g, ""));
  },
  type: "numeric"
});
$(function() {
$("table").tablesorter( {sorter:'commaDigit'})
});
});

That was the only way I was able to get this to work. I'll stop commenting now.