Acknowledge these alerts for
%input#n_hours{ :name => 'n_hours', :type => "number", :min => 0, :max => 48, :value => 2, :style => "min-width: 6ex;"}
%select#type_hours{:name => 'type_of_hours'  } 
  -# Default to daytime hours
  %option{ :value => "working" }                         working
  %option{ :value => "daytime", :selected => "selected"} daytime
  %option{ :value => "wallclock" }                       wall-clock
hours
%span#ack_until_text
%input#ack_until{ :value => '', :type => :hidden, :name => 'ack_until' } 
%input{ :type => 'submit', :value => 'Go!' } 
:javascript
  // Change of value in the hours box
  $('#n_hours').change( function() { 
    updateDate();
  });
  // As above, but on keypress, with a delay
  $('#n_hours').keyup( function() { 
    clearTimeout($.data(this, 'timer'));
    var wait = setTimeout(updateDate, 500);
    $(this).data('timer', wait);
  });
  // Same as the n_hours change function
  $('#type_hours').change( function() { 
    $('#n_hours').change();
  });
  // Setup the ack text on load.
  $(document).ready( function() { 
    $('#n_hours').change();
  });