easyUI吧複選框選中的value值返回

var businessTypeValue = "";

        var obj =document.getElementsByName("businessType");

        for (var i= 0; i < obj.length; i++) {

            if(obj[i].checked) {

               businessTypeValue += obj[i].value + ",";

            }

        }

       businessTypeValue = businessTypeValue.substring(0,businessTypeValue.length - 1);