.ajax方法擷取JSON資料

        $.ajax({
            url: 'http://www.cnblogs.com/Common/Ajax/GetSpecialtyCoursesJsonData.ashx',
            data: {S_CourseID: courseid , CurrTime : new Date().getTime()}, //加個時間戳記，否則會不自動更新資料
            dataType: 'json',
            success: function(data)
            {
           
                if (data != null) {
               
                    if ( data.length > 0) {
                   
                         for(var i = 0 ; i < data.length ; i++){
                   
                            specids = specids + data[i].S_SpecialtyID + ","; //擷取JSON對象中的資料
                            
                            coursetypeid = data[i].S_CourseTypeID ;
                   
                        }
                       
                        if (specids.length >0) {
                           
                            specids = specids.substring(0,specids.length-1);
                       
                        }
                   
                    }