怎么用这个server请求调用后台的方法，后台的删除功能要怎么实现

$.post(localStorage.getItem('$server') + "GetFsjList", {
            guid: guid
        }, function (result) {
            try {
                var obj = JSON.parse(result);
            } catch (e) {
                alert("项目信息获取失败!\n" + exception);
                return;
            }
            if (obj.result == "0") {
                mui.alert(obj.DATA);
                return;
            }
            if (obj.DATA.length > 0) {
                var table = document.getElementById("item9ul");
                for (var i = 0; i < obj.DATA.length; i++) {
                    var li = document.createElement('li');
                    li.className = 'mui-table-view-cell taptap';
                    li.setAttribute("data-type", "fsj");
                    li.setAttribute("data-guid", obj.DATA[i].Guid); //16B0CBC8C6F24C0D86C78DAA1CC1A523
                    li.innerHTML = '<input class="mui-ellipsis1" id="btnDel" type="button" onclick="del()"  value="删除" />' +
                    '<div class="mui-table-cell mui-col-xs-10 ">' +
                        '<a class="mui-ellipsis fj-len" href="#">' + obj.DATA[i].Code +
                        '<h5>附属件名称：' + obj.DATA[i].Name + '</h5>' +
                        '<h5>规格型号：' + obj.DATA[i].Gg + '</h5></a>' +
                        '</div>';
                    table.insertBefore(li, table.firstChild);
                }
            }

        });

function del(Guid) {
           $.post(localStorage.getItem('$server') + "del",{
             Guid : Guid
            }
//            var del = window.confirm("你确定删除吗？");
//            if (del) {
//            }
            };

这就是删除按钮，大概要这样调用

 public void del(string Guid)
    {
        DBHelper dbh1 = new DBHelper();
        DataTable dt1 = dbh1.GetDataTable1("delete from zc_fsj where Guid = '" + Guid + "'");
    }

然后后台怎么实现啊

你的dbhelper怎么写的?
直接调用dbhelper的删除方法就好了