function floss(select) {
	var selected_option = select.options[select.selectedIndex];
	if(is_contributor(selected_option) && !exists('contributor'))
		addAfter(select.parentNode, contributors_questions());
	else if (!is_contributor(selected_option))
		remove('contributor');
		
	carpeInit();
	var tools = document.getElementById("tools");
	if(tools != null)
		dragsort.makeListSortable(tools);
}
function store_sorting() {
	var list = document.getElementById('tools');
	if(list != null) {
		var elements = list.getElementsByTagName('li');
		for(var i = 0; i < elements.length; i++)
			store_position(i, elements[i]);
	}
}
function store_position(index, element) {
	var hidden = document.getElementById('q'+(48+index));
	var position_value = element.innerHTML;
	hidden.value = position_value;
}
function validate_filled(element) {
	return function() {
		validate(element, 'Required');
	};
}
function validate_radios() {
	var ok = true;
    for (var i = 0, n = arguments.length; i < n; i++)
      ok = validate_radio(arguments[i]) && ok;
	if(!ok)
		errored = true;
	return ok;
}
function validate_radio(span_id) {
	var span = document.getElementById(span_id);
	if(span != null) {
		var list = span.parentNode;
		var label = span.previousSibling.previousSibling;
		var inputs = list.getElementsByTagName('input');
		var radios = new Array();
		var text = null;
		for(i in inputs)
			if(inputs[i].type == 'radio') 
				radios.push(inputs[i]);
			else if(inputs[i].type == 'text')
				text = inputs[i];
		
		var ok = false;
		var checked = null;
		for(var radio = 0; radio < radios.length; radio++)
			if(radios[radio].checked == true)
				checked = radios[radio];
		if(checked != null && checked.value != "Other")
			correct(label, true); 
		else if(checked != null && checked.value == "Other" && text.value == "")
			error(text, 'text', "This field is required.");
		else  if(checked == null)
			error(label,'radio',"At least one option must be chosen");
			
		return checked != null && (checked.value != "Other" || text.value != "");
	}
	return true;
}
function error(elem, type, message){
	correct(elem);
	if(!checkForErrorDiv(elem)){
		div = document.createElement("div");
		div.innerHTML = (message)? message : getMsg(type);
		div.className = "Errortext";
		elem.parentNode.appendChild(div);
	}
	if(elem.className != "error")
		exClassName[elem.name] = elem.className;
	if(elem.type != "checkbox" && elem.type != "radio")
		elem.className = "error";
	return true;
}
function checkForErrorDiv(elem){
	for(var node = 0;node < elem.parentNode.childNodes.length; node++)
		if(elem.parentNode.childNodes[node].className == "Errortext")
			return true;
	return false;
}
function correct(elem){
	var parent = elem.parentNode;
	for(x = 0; x < parent.childNodes.length; x++){
		var node = parent.childNodes[x];
		if(node){
			if(node.className == "Errortext")
				node.parentNode.removeChild(node);
			if(node.className == "error")
				node.className = exClassName[node.name];
		}
	}
}
function is_contributor(option) {
	return option.value != "" && option.value != "0";
}
function exists(id) {
	return document.getElementById(id) != null;
}
function addAfter(previous, node) {
	previous.parentNode.insertBefore(node, previous.nextSibling);
}
function get_selected_option(id) {
	var select = document.getElementById(id);
	return select.options[select.selectedIndex];
}
function remove(id) {
	var element = document.getElementById(id);
	if(element != null)
		element.parentNode.removeChild(element);
}
function generate_array(first_limit, last_limit, increment) {
	if(increment == null)
		increment=1;

	var results = new Array();
	var start = Math.min(first_limit, last_limit);
	var end = Math.max(first_limit, last_limit);
	for(var i = start; i <= end; i++)
		results.push(i);

	if(start == last_limit)
		return results.reverse();
	return results;
}
function create_option(value) {
	var option = document.createElement('option');
	option.innerHTML=value;
	option.value=value;
	return option;
}
function generate_options(array) {
	var options = new Array();
	for(i in array)
		options.push(create_option(array[i]));
	return options;
}
function create_label(target, text) {
	var label = document.createElement('label');
	label.htmlFor=target;
	label.innerHTML=text;
	return label;
}
function create_select(id, options) {
	var select = document.createElement('select');
	select.id = id;
	select.onblur = validate_filled(select);
	for(i in options)
		select.options[i] = options[i];
	return select;
}
function create_text(id, name, maxsize) {
	var input = document.createElement('input');
	input.type='text';
	input.name=name;
	if(maxsize != null)
		input.maxLength=maxsize;
	input.id = id;
	return input;
}
function create_radio_span(main_id, name, choices, next_name, distribute_func, inc) {
	var span = document.createElement('span');
	span.id='q'+main_id;
	if(inc == null)
		inc = 1;
	var next_id='q'+(main_id+inc);
	
	var func = null;
	if(distribute_func != null)
		func = distribute_func(count);
	var focus_fnc = function(text) {
		return function() {
			if(func != null) func();
			var other_text=document.getElementById(next_id);
			if(other_text == null) return;
			other_text.disabled=(text != "Other");
			if(other_text.disabled) {
				other_text.value="";
				correct(other_text);
			}
			else
				other_text.focus();
			correct(span);
		}
	};
	
	for(var count = 0; count < choices.length; count++) {
		var radio = create_simple_radio('q'+main_id, count, name, choices[count], focus_fnc(choices[count]));	
		add_with_label(span, radio);
		span.appendChild(document.createTextNode(' '));
		if(radio.value == "Other") {
			var other_text = create_text(next_id, next_name);
			other_text.disabled=true;
			other_text.onblur = function() {
				if(!other_text.disabled)
					validate_filled(other_text)();
			};
			span.appendChild(other_text);
		}
		span.appendChild(document.createElement('br'));
	}
	
	return span;
}
function create_checkbox_span(main_id, name, choices) {
	var span = document.createElement('span');
	span.id='q'+main_id;
	
	for(var count = 0; count < choices.length; count++) {
		add_with_label(span, create_simple_checkbox(main_id, count, name, choices[count]));
		span.appendChild(document.createElement('br'));
	}
	
	return span;
}
function create_simple_checkbox(main_id, count, name, text, focus_fnc) {
	return create_simple_input('checkbox', main_id, count, name, text, focus_fnc);
}
function create_simple_input(type, main_id, count, name, text, focus_fnc) {
	var radio = document.createElement('input');
	radio.name=name;
	radio.id=main_id+'_'+count;
	radio.type=type;
	radio.value=text;
	if(focus_fnc != null)
		radio.onclick=focus_fnc;
	return radio;	
}

function create_simple_radio(main_id, count, name, text, focus_fnc) {
	return create_simple_input('radio', main_id, count, name, text, focus_fnc);
}
function add_with_label(parent, element) {
	parent.appendChild(element);
	parent.appendChild(document.createTextNode(' '));
	parent.appendChild(create_label(element.id, element.value));
}
function create_yes_no_radio(main_id, name, ifyes, ifno) {
	var span = document.createElement('span');
	span.id=main_id;

	var yes_radio = create_simple_radio(main_id, 0, name, "Yes", ifyes);
	add_with_label(span, yes_radio);
	span.appendChild(document.createTextNode(' '));
	
	var no_radio = create_simple_radio(main_id, 1, name, "No", ifno);
	add_with_label(span, no_radio);
	span.appendChild(document.createElement('br'));
	
	return span;
}
function create_slider(id, name, leftLabel, rightLabel) {
	var span = document.createElement('span');
	
	var hidden = document.createElement('input');
	hidden.type='hidden';
	hidden.id=id;
	hidden.name=name;
	hidden.value=0;
	
	span.appendChild(hidden);

	var answerTable = document.createElement('table');
	answerTable.cols=3;
	var answerRow = document.createElement('tr');
	
	var leftTd = document.createElement('td');
	leftTd.className="slider_left_label";
	leftTd.appendChild(document.createTextNode(leftLabel));
	
	var sliderParentTd = document.createElement('td');
	sliderParentTd.className="carpe_horizontal_slider_track";
	
	var sliderSlitDiv = document.createElement('div');
	sliderSlitDiv.className="carpe_slider_slit";
	sliderParentTd.appendChild(sliderSlitDiv);
	
	var sliderDiv = document.createElement('div');
	sliderDiv.id='slider_'+id;
	sliderDiv.className='carpe_slider';
	sliderDiv.display=id;
	sliderParentTd.appendChild(sliderDiv);
	
	var rightTd = document.createElement('td');
	rightTd.className="slider_right_label";
	rightTd.appendChild(document.createTextNode(rightLabel));
	
	answerRow.appendChild(leftTd);
	answerRow.appendChild(sliderParentTd);
	answerRow.appendChild(rightTd);
	
	answerTable.appendChild(answerRow);
	
	span.appendChild(answerTable);
	return span;
}
function contributors_questions() {
	var span = document.createElement('span');
	span.id = 'contributor';
	
	span.appendChild(create_q16());
	span.appendChild(create_q17());
	span.appendChild(create_q18());
	span.appendChild(create_q19());
	span.appendChild(create_q21());
	span.appendChild(create_q24());
	span.appendChild(create_q34());
	span.appendChild(create_q29());
	span.appendChild(create_q36());
	span.appendChild(create_q37());
	span.appendChild(create_q38());
	
	return span;
}
function get_birth_year(other) {
	var birth = get_selected_option('q12').value;
	if(birth == "")
		return other;
	return parseInt(birth);
}
function create_q16() {
	var question = document.createElement('li');
	var label = create_label('q16','In which year was your first FLOSS contribution?');
	
	var years = new Array('').concat(generate_array(2009, get_birth_year(1955) + 5));
	var year_options = generate_options(years);
	var select = create_select('q16', year_options);
	select.name='q16_411stFLOSScontributi';
	
	question.appendChild(label);
	question.appendChild(document.createTextNode(' '));
	question.appendChild(select);
	
	return question;
}
function create_q17() {
	var question = document.createElement('li');
	var label = create_label('q17','What is the name of the FLOSS project you mostly contribute (or contributed) with?');
	var input = create_text('q17', 'q17_42Mainprojectname', 100);
	input.onblur = validate_filled(input);
	
	question.appendChild(label);
	question.appendChild(document.createTextNode(' '));
	question.appendChild(input);
	
	return question;
}
function create_q18() {
	var question = document.createElement('li');
	var label = create_label('q18','In which year was your first contribution to that project?');
	
	var years = new Array('').concat(generate_array(2009, get_birth_year(1955) + 5));
	var year_options = generate_options(years);
	
	var select = create_select('q18', year_options);
	select.name='q18_431stcontributiontop';
	
	question.appendChild(label);
	question.appendChild(document.createTextNode(' '));
	question.appendChild(select);
	
	return question;
}
function create_q19() {
	var question = document.createElement('li');
	var label = create_label('q19','What is (or was) your main role in that project?<br/>');
	
	question.appendChild(label);
	question.appendChild(document.createTextNode(' '));
	var choices = ['Maintainer', 'Commiter', 'Programmer', 'Tester', 'Documentation writer', 'Bug reporter/Feature requester', 'User', 'Other'];
	question.appendChild(create_radio_span(19, 'q19_44Mainroleinproject', choices, 'q20_441IfOtherwhatrole'));
	
	return question;
}
function create_q21() {
	var question = document.createElement('li');
	var label = create_label('q21','Do (Did) you receive any income from your FLOSS contributions?');
	
	question.appendChild(label);
	question.appendChild(document.createTextNode(' '));
	var ifyes = function() {
		var parent_question = document.getElementById('q21');

		remove('q23_list');
		if(!exists('q22')) {
			var new_question = create_q22();
			addAfter(parent_question, new_question);
		}
	};
	var ifno = function() {
		var parent_question = document.getElementById('q21');
		
		remove('q22_list');
		if(!exists('q23')) {
			var new_question = create_q23();
			addAfter(parent_question, new_question);
		}
	};
	question.appendChild(create_yes_no_radio('q21', 'q21_5IncomefromFLOSS', ifyes, ifno));
	
	return question;
}
function create_q22() {
	var list = document.createElement('ol');
	list.className="no_numbers";
	list.id='q22_list';
	var question = document.createElement('li');
	var label = create_label('q22','Is (Was) this your main income?');
	
	question.appendChild(label);
	question.appendChild(document.createTextNode(' '));
	var ifyes = function() {
		remove('q23_list');
	};
	var ifno = function() {
		var parent_question = document.getElementById('q22');
		
		if(!exists('q23')) {
			var new_question = create_q23();
			addAfter(parent_question, new_question);
		}
	};
	question.appendChild(create_yes_no_radio('q22', 'q22_51Mainincome', ifyes, ifno));
	list.appendChild(question);
	
	return list;
}
function create_q23() {
	var list = document.createElement('ol');
	list.className="no_numbers";
	list.id='q23_list';
	var question = document.createElement('li');
	var label = create_label('q23','Is your main income related to IT?');
	
	question.appendChild(label);
	question.appendChild(document.createTextNode(' '));
	question.appendChild(create_yes_no_radio('q23', 'q23_52Mainincomerelatedt'));
	list.appendChild(question);
	
	return list;
}
function create_q24() {
	var question = document.createElement('li');
	var label = create_label('q24','How many people work (or worked) with you on your main FLOSS project?<br/>');
	
	question.appendChild(label);
	question.appendChild(document.createTextNode(' '));
	var choices = ['0', '1 to 5', '6 to 10', '11 to 50', 'more than 50'];
	var distribute_functions = function(count) {
		if(count == 0)
			return function() {
			     remove('list_q30');
			     remove('list_q28');
			};
		else
			return function() {
				var lastAdded = question;
				if(!exists('list_q30')) {
					var new_question = create_q30();
					addAfter(lastAdded, new_question);
					lastAdded = new_question;
				}
				if(!exists('list_q28')) {
					var new_question = create_q28();
					addAfter(lastAdded, new_question);
					lastAdded = new_question;
				}
				if(lastAdded != question)
					carpeInit();			
			};
	};
	question.appendChild(create_radio_span(24, 'q24_6Peopleworkingwithyo', choices, null, distribute_functions));
	
	return question;
}
function get_communication_channels() {
	return ['Face to face',
			'Website',
			'Mailing List',
			'Issue tracker (Trac, Bugzilla, etc.)',
			'Internet Relay Chat (IRC)',
			'Instant Message (Jabber, MSN, ICQ, etc.)',
			'Email',
			'VoIP (Skype, Ekiga, iChat, etc.)',
			'None',
			'Other'];
}

function create_q30() {
	var question = document.createElement('li');
	question.id='list_q30';
	var label = create_label('q30','What is (or was) your main communication channel with your team of that FLOSS project?<br/>');
	
	question.appendChild(label);
	question.appendChild(document.createTextNode(' '));
	var choices = get_communication_channels();
	question.appendChild(create_radio_span(30, 'q30_9Maincommunicationch', choices, 'q32_71IfOtherwhatchannel', null, 2));
	
	return question;
}
function create_q28() {
	var question = document.createElement('li');
	question.id='list_q28';
	var label = create_label('q28','How would you evaluate the quality of your communication with that team?<br/>');
	
	question.appendChild(label);
	var slider = create_slider('q28', 'q28_8Qualityofcommunicat', 'Extremely poor', 'Perfect');
	question.appendChild(slider);
	
	return question;
}
function create_q34() {
	var question = document.createElement('li');
	var label = create_label('q34','What is (or was) your main communication channel with the users of that FLOSS project?<br/>');
	
	question.appendChild(label);
	question.appendChild(document.createTextNode(' '));
	var choices = get_communication_channels();
	question.appendChild(create_radio_span(34, 'q34_9Maincommunicationch', choices, 'q35_10IfOtherwhatchannel'));
	
	return question;
}
function create_q29() {
	var question = document.createElement('li');
	var label = create_label('q29','How would you evaluate the quality of your communication with the users?<br/>');
	
	question.appendChild(label);
	var slider = create_slider('q29', 'q29_11Qualityofcommunica', 'Extremely poor', 'Perfect');
	question.appendChild(slider);
	
	return question;
}
function create_q36() {
	var question = document.createElement('li');
	var label = create_label('q36','How much effort do (or did) you spend to keep the project\'s informations updated?<br/>');
	
	question.appendChild(label);
	var slider = create_slider('q36', 'q36_12Efforttokeepinfoup', 'Very little', 'Huge');
	question.appendChild(slider);
	
	return question;
}
function get_tools() {
	return ['Automatic email/message on build failure',
	'Dynamic roadmap status from Issue Tracking System',
	'Issue tracking management from repository commit logs',
	'Website one-click release build from repository',
	'Automatic metric graphic generation and updating from repository',
	'Collaborative issue priority sorting',
	'Timeline on website that allows notes/comments to facilitate retrospective analysis',
	'A robot on your communication channel to keep log of the last events'];
}
function create_q37() {
	var question = document.createElement('li');
	var label = create_label('q37','Which of the following tools does (or did) your project already use?<br/>');
	
	question.appendChild(label);
	question.appendChild(document.createTextNode(' '));
	var tools = get_tools();
	question.appendChild(create_checkbox_span('q37', 'q37_13Whichofthoseyourpr[]', tools));
	
	return question;
}
function create_q38() {
	var question = document.createElement('li');
	var label = create_label('q38','Sort the tools from the most usefull (first) to the less usefull (last).<br/>Drag and drop the items to sort them.<br/>');
	
	question.appendChild(label);
	question.appendChild(document.createTextNode(' '));
	var tools = get_tools();
	var sorting = document.createElement('ol');
	sorting.id='tools';
	for(var i = 0; i < tools.length; i++) {
		var item = document.createElement('li');
		item.appendChild(document.createTextNode(tools[i]));
		item.className='draggable';
		item.onmouseover=function(){this.className='draggable hoover'};
		item.onmouseout=function(){this.className='draggable'};
		var hidden = document.createElement('input');
		hidden.type='hidden';
		hidden.id='q'+(48+i);
		hidden.name='q'+(48+i)+'_14'+i+'Whatisthenumber'+(i+1)+'t';
		hidden.value=tools[i];
		question.appendChild(hidden);
		sorting.appendChild(item);
	}
	question.appendChild(sorting);
	
	return question;
}