方法一、

復制代碼 代碼如下:

 function CheckForm() {
             if(document.form1.trainingName.value==""){
                     alert("培訓班名稱不能為空！");
                     document.form1.trainingName.focus();
                     return false;
             }
    }

復制代碼 代碼如下:

      function CheckForm() {

             var classLevel = $("#classLevel").val();
              var re = /^[1-9][0-9]*$/;
              if(!re.test(classLevel)&&classLevel.length>0){
              alert("請輸年級入大于零的整數！");
              $("#classLevel").focus();
              return false;
          }
    }