1、先绑定属性data-groupClassId

var span2 = '<span class="replaceBlue cursor" data-target="#myModalMember" data-toggle="modal" data-groupClassId="'+groupId+'" >成员管理</span>';

 一、  //成员管理

    $('#myModalMember').on('show.bs.modal',function(event){
var groupClassId = $(event.relatedTarget).attr('data-groupClassId'); //获取id 后这里可以直接用
     console.log(groupClassId);  

        sercice(sUrl.selectGroupMemberInfo, function(data){

            if(data.success){

                var GroupMemberInfos = data.body.GroupMemberInfos;

                var str='';

                if(GroupMemberInfos.length>0){

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

                        var userName = GroupMemberInfos[i].userName;

                        var courseCount = GroupMemberInfos[i].courseCount;

                        var isMember = GroupMemberInfos[i].isMember;

                        str+='<div class="clearfix item">';

                        str+=    '<span class="pull-left">'+userName+'-'+courseCount+'节</span>';

                        str+=    '<span class="pull-right">';

                        str+=        '<input type="checkbox" id="awesome_'+i+'" onclick="checkBox(this)">';

                        str+=        '<label for="awesome_'+i+'"></label>';

                        str+=    '</span>';

                        str+='</div>';

                    }

                }

                $("#selectStu").html(str);

            }

        }, {

            "addressId" : storageAddressId,

            "token":token,

            "groupClassId":groupClassId

　　　　})

　　});

二、 //成员管理

    $('#myModalMember').on('show.bs.modal',function(event){

　　　　 var groupClassId = $(event.relatedTarget).attr('data-groupClassId') ; //获取 后这里可以直接用

      //给此弹框绑定 后面函数可以直接用

      $("#myModalMember").attr('data-groupClassId',groupClassId);

      abc();


　　});

      function abc(){
var groupClassId  = $("#myModalMember").attr('data-groupClassId',groupClassId); //获取弹框上的id

            sercice(sUrl.selectGroupMemberInfo, function(data){

            if(data.success){

                var GroupMemberInfos = data.body.GroupMemberInfos;

                var str='';

                if(GroupMemberInfos.length>0){

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

                        var userName = GroupMemberInfos[i].userName;

                        var courseCount = GroupMemberInfos[i].courseCount;

                        var isMember = GroupMemberInfos[i].isMember;

                        str+='<div class="clearfix item">';

                        str+=    '<span class="pull-left">'+userName+'-'+courseCount+'节</span>';

                        str+=    '<span class="pull-right">';

                        str+=        '<input type="checkbox" id="awesome_'+i+'" onclick="checkBox(this)">';

                        str+=        '<label for="awesome_'+i+'"></label>';

                        str+=    '</span>';

                        str+='</div>';

                    }

                }

                $("#selectStu").html(str);

            }

        }, {

            "addressId" : storageAddressId,

            "token":token,
"groupClassId":groupClassId

　　　　})

    }