ajax请求ashx报错object XMLHttpRequest
function saveclick() {
        var subject = $("#<%=subject.ClientID %>").attr("value");
        var starttime = $("#<%=starttime.ClientID %>").attr("value");
        var endtime = $("#<%=endtime.ClientID %>").attr("value");
        var isallday = $("#<%=isallday.ClientID %>").attr("checked");
        var warn = $("#<%=warn.ClientID %>").attr("checked");
        var description = $("#<%=description.ClientID %>").val();
        $.ajax({
            type: "post",
//            contentType: "application/json",
            dataType: "json",
            cache: false,
            url: "MyLog.ashx?subject=" + subject + "&starttime=" + starttime + "&endtime=" + endtime + "&isallday=" + isallday + "&warn=" + warn + "&description=" + description,
            success: function () {
                alert("添加成功");
            }
        });
        parent.$.ligerDialog.close();
        parent.$(".l-dialog,.l-window-mask").remove();
｝

<input id="Button2" type="button" value="确定" runat="server" class="button2" onclick="saveclick()"/>

public class MyLog : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            string cnnstr = ConfigurationManager.ConnectionStrings["WorkDiaryConstr"].ConnectionString;
            SqlConnection connection = new SqlConnection(cnnstr);

            String insertcmd = "insert into WorkDiary(Work_UserID,Work_Title,Work_Description,Work_StartTime,Work_EndTime,Work_IsAllDayEvent,Work_WarnID,Work_Warn_State) values(newid(),@subject,@description,@starttime,@endtime,@isalldayevent,@warnid,@state)";
            SqlCommand mycmd = new SqlCommand(insertcmd, connection);
            mycmd.Parameters.AddWithValue("@subject", context.Request.Params["subject"].ToString());
            mycmd.Parameters.AddWithValue("@description", context.Request.Params["description"].ToString());
     &