/**

     * 合并单元格

     * @param table1    表格的ID

     * @param startRow  起始行

     * @param col   合并的列号，对第几列进行合并(从0开始)。如果传下来为0就是从第一列开头到结束合并

     */ 

      function mergeCell(table1, startRow, mergeColArr){            

            var tb = document.getElementById(table1);

            var endRow=tb.rows.length;

            var colLen = tb.rows[0].cells.length - 1;

            var cmpCnt = "order_no";

            var orderRows = [];

            var bgColor = ["rgb(252,252,252)","rgb(242,242,242)"];

            var orderIdx = 0;

          //每个订单的起始行号

            var mergeStarRow = 1;

            for (var i = startRow; i < endRow; i++) {

                      if(typeof tb.rows[i + 1] === "undefined"){

                          for(var m = colLen; m >= 0; m--){

                              tb.rows[i].cells[m].style.backgroundColor = bgColor[orderIdx % 2];

                          }

                          break;

                      }

                      var prev_rows = tb.rows[startRow],prev_cells = prev_rows.cells;

                      var next_rows = tb.rows[i + 1],next_cells = next_rows.cells;

                      if ($.trim(prev_rows.getAttribute(cmpCnt)) == $.trim(next_rows.getAttribute(cmpCnt)))

                    {

                          if(typeof tb.rows[i + 2] === "undefined"){

                            orderRows.push({"starow":mergeStarRow,"endrow":i+1});

                          }

                        continue;

                    }else{

                        startRow = i + 1;

                        orderRows.push({"starow":mergeStarRow,"endrow":i});

                        mergeStarRow = startRow;

                        orderIdx++;

                    }

            }

          var len = orderRows.length;

          for(var n = 0;n < len; n++){

              var starow = orderRows[n]["starow"];

              var endrow = orderRows[n]["endrow"];

              var rowspan = endrow - starow + 1;

                //循环行

                for(var j = starow; j <= endrow; j++){

                        var flag = false;

                        //反序循环列（因为删掉td后索引会变）

                        for(var k = colLen; k >= 0; k--){

                           tb.rows[j].cells[k].style.backgroundColor = bgColor[n % 2];

                           if(mergeColArr.indexOf(k) > -1){

                              //如果是第一行，就设置rowSpan

                              if(j === starow){

                                  tb.rows[j].cells[k].rowSpan = rowspan;

                              }else{

                                  //否则就倒序删掉mergeColArr[k]列

                                  tb.rows[j].removeChild(tb.rows[j].cells[k]);

                              }

                           }

                        }

                }

          }

        }

      mergeCell('c1',1,[0,1,2,6,7,8,9,10,12]);