jquery,js一些操作

1，获取select中选中的option值：$('#year').find('option:selected').val();

设置dom的值document.getElementById("month").value=month;
2，对表格的遍历操作:
var tab = document.getElementById('calendar');
      for (var i=1; i < tab.rows.length; i++){
          for (var j=1;j< tab.rows.item(i).cells.length;j++) {
           tab.rows.item(i).cells[j].innerHTML = "";
          }
      }
3,ajax请求：
$.ajax({
        type: "post",
        async:false,
         url: "/es/Pages/dutyScheme/zhbgl/EvnEtsDutyschemeAction_findDutyscheme.action",
         data:{
              "date1":dat,
              "month":month,
              "year":year
           },
          success:
           function(data){
           if(data.dutyscheme!=null){
           showDate2(j,k,data,dat);
           }
           },
         error:function(data){
           //alert("请导入本月的排班表");
            alert("请导入本月份工作表")
           return orderNum;
           }
       });