jQuery table列內容合併

//列內容合併
jQuery.fn.rowspan = function(colIdx) {
   return this.each(function(){
      var that;
      $('tr', this).each(function(row) {
         $('td:eq('+colIdx+')', this).filter(':visible').each(function(col) {
            if (that!=null && $(this).html() == $(that).html()) {
               rowspan = $(that).attr("rowSpan");
               if (rowspan == undefined) {
                  $(that).attr("rowSpan",1);
                  rowspan = $(that).attr("rowSpan"); }
               rowspan = Number(rowspan)+1;
               $(that).attr("rowSpan",rowspan);
               $(this).hide();
            } else {
               that = this;
            }
         });
      });
   });
}

$("#Table").rowspan(0);