private String contentTable(Timer time, String nameTask){
        if(type == Type.RUNNING_TASKS){
            return("<tr> <td>"+ time +"</td> <td>"+ nameTask +
            "<td><a href='task?name_task="+ nameTask +"' target='_blank' >Detaily úkolu</a> </td> "+
            "<td><a href='stopwatch?end_task="+ nameTask +"'>Ukončit</a> </td> "
            );
        }
        if(type == Type.FINISHED_TASKS){
            return ("<tr> <td>"+ time +"</td> <td>"+ nameTask +
            "<td><a href='task?name_task="+ nameTask +"' target='_blank' >Detaily úkolu</a> </td> "
            );
        }
        
        return "";
    }