window.onload = function() {
  updatebuttons();
}

function updatebuttons() {
  if(document.find.school.selectedIndex==-1) {
    document.getElementById('subscribe').className='disabled';
    document.getElementById('view_calendar').className='disabled';
    document.getElementById('view_sports_schedules').className='disabled';
    document.getElementById('view_classroom_pages').className='disabled';
    document.getElementById('view_menus').className='disabled';
    document.getElementById('download_events').className='disabled';
    document.getElementById('download_events_ical').className='disabled';
    document.getElementById('transportation').className='disabled';
    
    document.getElementById('subscribe').disabled=true;
    document.getElementById('view_calendar').disabled=true;
    document.getElementById('view_sports_schedules').disabled=true;
    document.getElementById('view_classroom_pages').disabled=true;
    document.getElementById('view_menus').disabled=true;
    document.getElementById('download_events').disabled=true;
    document.getElementById('download_events_ical').disabled=true;
    document.getElementById('transportation').disabled=true;

  }
  else {
    document.getElementById('subscribe').className='enabled';
    document.getElementById('view_calendar').className='enabled';
    document.getElementById('view_sports_schedules').className='enabled';
    document.getElementById('view_classroom_pages').className='enabled';
    document.getElementById('view_menus').className='enabled';
    document.getElementById('download_events').className='enabled';
    document.getElementById('download_events_ical').className='enabled';
    document.getElementById('transportation').className='enabled';
    
    document.getElementById('subscribe').disabled=false;
    document.getElementById('view_calendar').disabled=false;
    document.getElementById('view_sports_schedules').disabled=false;
    document.getElementById('view_classroom_pages').disabled=false;
    document.getElementById('view_menus').disabled=false;
    document.getElementById('download_events').disabled=false;
    document.getElementById('download_events_ical').disabled=false;
    document.getElementById('transportation').disabled=false;
  }
}

function sendbutton(url) {
  var schools_el=document.find.school;
    document.location=url+schools_el.options[schools_el.selectedIndex].value;
}