function authChange() {

	auth_list = document.getElementById('authority');
	centre_list = document.getElementById('centre');
	selected_auth = auth_list.options[auth_list.selectedIndex].value;

	centre_list_sel = centre[selected_auth];
	id_list_sel = id[selected_auth];

	centre_list.length = 0;  //Clears the list
	centre_list.disabled = 0;

	for (i=0; i < centre_list_sel.length; i++) {

		centre_list.options[i] = new Option(centre_list_sel[i], id_list_sel[i]);

	}

}

function pickSchool(id) {

	authChange();
	auth_list = document.getElementById('authority');
	selected_auth = auth_list.options[auth_list.selectedIndex].value;

	centre_list = document.getElementById('centre');

	for (i=0; i<centre_list.options.length; i++) {

		if (centre_list.options[i].value==id) {
			centre_list.selectedIndex = i;
			break;
		}

	}
}

//DATA

var id = new Array();
var centre = new Array();

id['AC'] = new Array ( '386', '413' );
centre['AC'] = new Array ( 'Aberdeen Waldorf (Steiner) School', 'International School of Aberdeen' );

id['AS'] = new Array ( '6', '31', '127', '178', '241' );
centre['AS'] = new Array ( 'Alford Academy', 'Banff Academy', 'Ellon Academy', 'Inverurie Academy', 'Meldrum Academy' );

id['AN'] = new Array ( '13', '14', '60', '132', '374' );
centre['AN'] = new Array ( 'Arbroath Academy', 'Arbroath High School', 'Brechin High School', 'Forfar Academy', 'Webster\'s High School' );

id['AB'] = new Array ( '68', '119', '180', '226', '354', '358', '359' );
centre['AB'] = new Array ( 'Campbeltown Grammar School', 'Dunoon Grammar School', 'Islay High School', 'Lochgilphead High School', 'Tarbert Academy', 'Tiree High School', 'Tobermory High School' );

id['CL'] = new Array ( '8' );
centre['CL'] = new Array ( 'Alloa Academy' );

id['DG'] = new Array ( '393', '98', '101', '202', '210', '227', '247', '425', '372' );
centre['DG'] = new Array ( 'Cademuir International School', 'Dalbeattie High School', 'Dalry School', 'Kirkcudbright Academy', 'Langholm Academy', 'Lockerbie Academy', 'Moffat Academy', 'River of Life Christian School', 'Wallace Hall Academy' );

id['DC'] = new Array ( '55', '89', '158', '409', '412', '215', '242', '250', '323', '342' );
centre['DC'] = new Array ( 'Braeview Academy', 'Craigie High School', 'Grove Academy', 'High School of Dundee', 'Imam Muhammad Zakariya School', 'Lawside RC Academy', 'Menzieshill High School', 'Morgan Academy', 'St John\'s RC High School', 'St Saviour\'s RC High School' );

id['EA'] = new Array ( '96', '182', '230', '324' );
centre['EA'] = new Array ( 'Cumnock Academy', 'James Hamilton Academy', 'Loudoun Academy', 'St Joseph\'s Academy' );

id['ED'] = new Array ( '51', '203', '217', '356', '364' );
centre['ED'] = new Array ( 'Boclair Academy', 'Kirkintilloch High School', 'Lenzie Academy', 'Thomas Muir High School', 'Turnbull High School' );

id['EL'] = new Array ( '391', '418', '251', '281' );
centre['EL'] = new Array ( 'Belhaven Hill', 'Loretto School', 'Musselburgh Grammar School', 'Preston Lodge High School' );

id['ER'] = new Array ( '35', '468', '327', '338', '383' );
centre['ER'] = new Array ( 'Barrhead High School', 'G Cornwallis', 'St Luke\'s High School', 'St Ninian\'s High School', 'Williamwood High School' );

id['EC'] = new Array ( '25', '52', '62', '394', '75', '90', '91', '97', '401', '131', '134', '149', '169', '511', '181', '219', '419', '279', '452', '285', '427', '314', '432', '434', '436', '345', '503', '291', '366', '377' );
centre['EC'] = new Array ( 'Balerno Community High School', 'Boroughmuir High School', 'Broughton High School', 'Cargilfield School', 'Castlebrae Community High School', 'Craigmount High School', 'Craigroyston Community High School', 'Currie High School', 'Fettes College', 'Firrhill High School', 'Forrester High School', 'Gracemount High School', 'Holy Rood High School', 'Hospital and Outreach Teaching Service', 'James Gillespie\'s High School', 'Liberton High School', 'Mannafields Christian School', 'Portobello High School', 'Quality Improvement', 'Queensferry High School', 'Rudolf Steiner School of Edinburgh', 'St Augustine\'s High School', 'St Margaret\'s School', 'St Mary\'s Music School', 'St Serf\'s School', 'St Thomas Of Aquin\'s High School', 'The Moray House School of Education', 'The Royal High School', 'Tynecastle High School', 'Wester Hailes Education Centre' );

id['WI'] = new Array ( '23', '37', '74', '99', '222', '265', '297', '298', '299', '301' );
centre['WI'] = new Array ( 'Back School', 'Bayble School', 'Castlebay School', 'Daliburgh School', 'Lionel School', 'Paible School', 'Sgoil Lionacleit', 'Sgoil-nan-Loch', 'Shawbost School', 'Sir E Scott School' );

id['FA'] = new Array ( '104', '484', '150', '152', '336' );
centre['FA'] = new Array ( 'Denny High School', 'Falkirk Day Unit', 'Graeme High School', 'Grangemouth High School', 'St Mungo\'s High School' );

id['FE'] = new Array ( '485', '467', '480', '474', '477', '450', '490', '460', '481', '508', '406', '493', '451', '482', '236', '498', '514', '449', '513', '473', '505', '476', '442', '500' );
centre['FE'] = new Array ( 'Aberdeen College', 'Adam Smith College', 'Angus College', 'Anniesland College', 'Argyll College', 'Ayr College', 'Basil Paterson College', 'Cardonald College', 'Carnegie College', 'Chichester College', 'Glenalmond College', 'INTO University Partnerships Ltd.', 'Inverness College', 'James Watt College', 'Marr College', 'Moray College', 'New College Lanarkshire', 'North Glasgow College', 'North West Regional College', 'Perth College', 'Reid Kerr College', 'South Lanarkshire College', 'Stow College', 'West Lothian College' );

id['FI'] = new Array ( '39', '41', '64', '472', '143', '144', '201', '204', '225', '423', '312', '370', '371' );
centre['FI'] = new Array ( 'Beath High School', 'Bell Baxter High School', 'Buckhaven High School', 'Education Adviser ICT', 'Glenrothes High School', 'Glenwood High School', 'Kirkcaldy High School', 'Kirkland High School & Community College', 'Lochgelly High School', 'New Park School', 'St Andrew\'s R C High School', 'Viewforth High School', 'Waid Academy' );

id['GC'] = new Array ( '7', '42', '77', '82', '110', '123', '504', '405', '148', '166', '167', '170', '172', '186', '206', '224', '231', '303', '313', '329', '335', '340', '344', '381' );
centre['GC'] = new Array ( 'All Saints Secondary School', 'Bellahouston Academy', 'Castlemilk High School', 'Cleveden Secondary School', 'Drumchapel High School', 'Eastbank Academy', 'Glasgow Gaelic School', 'Glasgow Steiner School', 'Govan High School', 'Hillhead High School', 'Hillpark Secondary School', 'Holyrood Secondary School', 'Hyndland Secondary School', 'John Paul Academy', 'Knightswood Secondary School', 'Lochend Community High School', 'Lourdes Secondary School', 'Smithycroft Secondary School', 'St Andrew\'s Secondary School', 'St Margaret Mary\'s Secondary School', 'St Mungo\'s Academy', 'St Paul\'s High School', 'St Thomas Aquinas Secondary School', 'Whitehill Secondary School' );

id['HI'] = new Array ( '9', '15', '93', '135', '137', '145', '153', '177', '191', '197', '198', '199', '223', '235', '244', '280', '428', '353', '368' );
centre['HI'] = new Array ( 'Alness Academy', 'Ardnamurchan High School', 'Culloden Academy', 'Fortrose Academy', 'Gairloch High School', 'Golspie High School', 'Grantown Grammar School', 'Inverness Royal Academy', 'Kilchuimen Academy', 'Kingussie High School', 'Kinlochbervie High School', 'Kinlochleven High School', 'Lochaber High School', 'Mallaig High School', 'Millburn Academy', 'Portree High School', 'Scoraig Secondary School', 'Tain Royal Academy', 'Ullapool High School' );

id['ID'] = new Array ( '443', '478', '398', '457', '512', '420', '496', '421', '455', '494', '492', '433', '501', '399' );
centre['ID'] = new Array ( 'Bedford High School', 'Clifton Hall School', 'Dollar Academy', 'Donaldson\'s', 'Lathallan School', 'Mary Erskine School', 'Melbourne Girls Grammar', 'Merchiston Castle School', 'Osborne House School', 'Pathways', 'Spark of Genius', 'St Margaret\'s School for Girls', 'Staughton College', 'The Edinburgh Academy' );

id['IN'] = new Array ( '395', '502', '155', '156', '259', '277', '318', '343' );
centre['IN'] = new Array ( 'Cedars School of Excellence', 'Clydeview Academy', 'Greenock Academy', 'Greenock High School', 'Notre Dame High School', 'Port Glasgow High School', 'St Columba\'s High School', 'St Stephen\'s High School' );

id['ML'] = new Array ( '40', '214' );
centre['ML'] = new Array ( 'Beeslack High School', 'Lasswade High School Centre' );

id['MO'] = new Array ( '387', '65', '126', '133', '407', '229', '245', '304' );
centre['MO'] = new Array ( 'Aberlour House Preparatory School', 'Buckie Community High School', 'Elgin High School', 'Forres Academy', 'Gordonstoun School', 'Lossiemouth High School', 'Milne\'s High School', 'Speyside High School' );

id['NA'] = new Array ( '194', '308' );
centre['NA'] = new Array ( 'Kilwinning Academy', 'St Andrew\'s Academy' );

id['NL'] = new Array ( '3', '4', '43', '66', '67', '69', '80', '83', '86', '87', '95', '102', '193', '263', '264', '287', '306', '499', '331', '332', '339', '355' );
centre['NL'] = new Array ( 'Abronhill High School', 'Airdrie Academy', 'Bellshill Academy', 'Calderhead High School', 'Caldervale High School', 'Cardinal Newman High School', 'Chryston High', 'Clyde Valley High School', 'Coltness High School', 'Columba High School', 'Cumbernauld High School', 'Dalziel High School', 'Kilsyth Academy', 'Our Lady\'s High School', 'Our Lady\'s High School', 'Rosehall High School', 'St Aidan\'s High School', 'St Andrew\'s High School', 'St Margaret\'s High School', 'St Maurice\'s High School', 'St Patrick\'s High School', 'Taylor High School' );

id['OR'] = new Array ( '205', '256', '274', '292', '351', '352' );
centre['OR'] = new Array ( 'Kirkwall Grammar School', 'North Walls Community School', 'Pierowall Junior High School', 'Sanday Junior High School', 'Stromness Academy', 'Stronsay Junior High School' );

id['PK'] = new Array ( '389', '48', '59', '88', '396', '92', '200', '422', '271', '275', '320', '488', '438' );
centre['PK'] = new Array ( 'Ardvreck School', 'Blairgowrie High School', 'Breadalbane Academy', 'Community School Of Auchterarder', 'Craigclowan Preparatory School', 'Crieff High School', 'Kinross High School', 'Morrison\'s Academy', 'Perth Grammar School', 'Pitlochry High', 'St Columba\'s RC High School', 'St. John\'s Academy', 'Strathallan School' );

id['RE'] = new Array ( '76', '142', '187', '266', '315' );
centre['RE'] = new Array ( 'Castlehead High School', 'Gleniffer High School', 'Johnstone High School', 'Paisley Grammar School', 'St Brendan\'s High School' );

id['SB'] = new Array ( '45', '138', '163', '184', '189', '435' );
centre['SB'] = new Array ( 'Berwickshire High School', 'Galashiels Academy', 'Hawick High School', 'Jedburgh Grammar School', 'Kelso High School', 'St Mary\'s School' );

id['SH'] = new Array ( '5', '28', '243', '293', '295', '302', '379' );
centre['SH'] = new Array ( 'Aith Junior High School', 'Baltasound Junior High School', 'Mid Yell Junior High School', 'Sandwick Junior High School', 'Scalloway Junior High School', 'Skerries School (S1-S4)', 'Whalsay School' );

id['SA'] = new Array ( '72', '140', '234', '282' );
centre['SA'] = new Array ( 'Carrick Academy', 'Girvan Academy', 'Mainholm Academy', 'Prestwick Academy' );

id['SL'] = new Array ( '46', '49', '78', '81', '117', '122', '400', '440', '408', '171', '185', '209', '213', '475', '348', '350', '447', '362', '367' );
centre['SL'] = new Array ( 'Biggar High School', 'Blantyre High School', 'Cathkin High School', 'Claremont High School', 'Duncanrig Secondary School', 'Earnock High School', 'Fernhill School', 'Fernhill School', 'Hamilton College', 'Hunter High School', 'John Ogilvie High School', 'Lanark Grammar School', 'Larkhall Academy', 'St Andrew\'s and St Bride\'s High School', 'Stonelaw High School', 'Strathaven Academy', 'Teacher Support', 'Trinity High School', 'Uddingston Grammar School' );

id['ST'] = new Array ( '116', '424', '334', '347', '373' );
centre['ST'] = new Array ( 'Dunblane High School', 'Queen Victoria School', 'St Modan\'s High School', 'Stirling High School', 'Wallace High School' );

id['TU'] = new Array ( '471', '463', '506', '465', '507', '456', '454', '515' );
centre['TU'] = new Array ( 'Arbelos', 'Gordon McIndoe', 'Kelly', 'Lee', 'Orphan Accounts', 'Roulston', 'Stirton', 'Toptutor' );

id['WD'] = new Array ( '56', '84', '112', '262', '310', '317', '369' );
centre['WD'] = new Array ( 'Braidfield High School', 'Clydebank High School', 'Dumbarton Academy', 'Our Lady & St Patrick\'s High School', 'St Andrew\'s High School', 'St Columba\'s High School', 'Vale Of Leven Academy' );

id['WL'] = new Array ( '17', '36', '63', '220', '326', '183', '448' );
centre['WL'] = new Array ( 'Armadale Academy', 'Bathgate Academy', 'Broxburn Academy', 'Linlithgow Academy', 'St Kentigern\'s Academy', 'The James Young High School', 'Willowgrove House' );