calendar.init = function ()
{
	var inputs = document.getElementsByTagName('input');

	for (var i = 0; i < inputs.length; i++)
	{
		if (class_handler.has(inputs[i], 'date'))
		{
			event_handler.remove(inputs[i], 'click', calendar.invoke);
			event_handler.add(inputs[i], 'click', calendar.invoke);

			inputs[i].style.backgroundImage = 'url('+calendar.img+')';
			inputs[i].style.backgroundPosition = 'center right';
			inputs[i].style.backgroundRepeat = 'no-repeat';
		}
	}

	var calendar_div = document.createElement('div');
	calendar_div.id = 'javascript_calendar';
	calendar_div.style.position = 'absolute';
	calendar_div.style.zIndex = '100';
	calendar_div.style.display = 'none';

	if (document.body)
	{
		document.body.appendChild(calendar_div);
	}
	else if (document.documentElement)
	{
		document.documentElement.appendChild(calendar_div);
	}

	event_handler.remove(window, 'click', calendar.windowClick);
	event_handler.add(window, 'click', calendar.windowClick);
};
calendar.invoke = function (event)
{
	calendar.destroy();

	var event = event_handler.fix(event);
	if (event.preventDefault)
	{
		event.preventDefault();
	}

	var element = event.target;

	if (element.tagName.toLowerCase() == 'img')
	{
		element = document.getElementById(element.id.substr(12, event.target.id.length));
	}

	calendar.invoked_by = element;
	calendar.setDateFormat(calendar.invoked_by.id);

	var param = [];
	var p = 0;

	param[p] = ['element_id', element.id];
	p++;

	param[p] = ['language', calendar.language];
	p++;

	var tmp_lang = calendar.language.defaults;
	if (eval('typeof(calendar.language.'+calendar.invoked_by.id+')') != 'undefined')
	{
		tmp_lang = eval('calendar.language.'+calendar.invoked_by.id);
	}

	param[p] = ['lang', tmp_lang];
	p++;

	var tmp_clear = calendar.show_clear.defaults;
	if (eval('typeof(calendar.show_clear.'+calendar.invoked_by.id+')') != 'undefined')
	{
		tmp_clear = eval('calendar.show_clear.'+calendar.invoked_by.id);
	}

	param[p] = ['show_clear', tmp_clear];
	p++;

	var tmp_backward = calendar.backward_select.defaults;
	if (eval('typeof(calendar.backward_select.'+calendar.invoked_by.id+')') != 'undefined')
	{
		tmp_backward = eval('calendar.backward_select.'+calendar.invoked_by.id);
	}

	param[p] = ['backward_select', tmp_backward];
	p++;

	if (eval('typeof(calendar.on_month.'+calendar.invoked_by.id+')') != 'undefined')
	{
		tmp_on_month = eval('calendar.on_month.'+calendar.invoked_by.id);
		param[p] = ['on_month', tmp_on_month];
		p++;
	}

	if (eval('typeof(calendar.on_year.'+calendar.invoked_by.id+')') != 'undefined')
	{
		tmp_on_year = eval('calendar.on_year.'+calendar.invoked_by.id);
		param[p] = ['on_year', tmp_on_year];
		p++;
	}

	var tmp_includes = calendar.includes.defaults;
	if (eval('typeof(calendar.includes.'+calendar.invoked_by.id+')') != 'undefined')
	{
		tmp_includes = eval('calendar.includes.'+calendar.invoked_by.id);
	}

	param[p] = ['includes', tmp_includes];
	p++;

	if (eval('typeof(calendar.params.'+calendar.invoked_by.id+')') != 'undefined')
	{
		tmp_params = eval('calendar.params.'+calendar.invoked_by.id);
		for (var i = 0; i < tmp_params.length; i++)
		{
			param[p] = [tmp_params[i][0], eval(tmp_params[i][1])];
			p++;
		}
	}

	param[p] = ['format', calendar.format];
	p++;

	if (element.value.length > 0)
	{
		param[p] = ['date', element.value];
		p++;
	}

	var requester = new xmlhttp_handler;
	if (requester.loadURL('POST', calendar.source, param, false))
	{
		var content = requester.getText();

		var calendar_div = document.getElementById('javascript_calendar');

		calendar_div.style.display = 'block';
		calendar_div.style.top = (position.getPositionY(event)+20)+'px';
		calendar_div.style.left = position.getPositionX(event)+'px';

		calendar_div.innerHTML = content;

		var anchors = calendar_div.getElementsByTagName('a');
		for (var i = 0; i < anchors.length; i++)
		{
			if (class_handler.has(anchors[i], 'close_cal'))
			{
				event_handler.add(anchors[i], 'click', calendar.destroy);
			}
			if (class_handler.has(anchors[i], 'clear_cal'))
			{
				event_handler.add(anchors[i], 'click', calendar.clear);
			}
			if (class_handler.has(anchors[i], 'fill_date'))
			{
				event_handler.add(anchors[i], 'click', calendar.fill_date);
			}
			else if (class_handler.has(anchors[i], 'move'))
			{
				event_handler.add(anchors[i], 'click', calendar.move);
			}
		}

		var selects = calendar_div.getElementsByTagName('select');
		for (var i = 0; i < selects.length; i++)
		{
			if (class_handler.has(selects[i], 'move'))
			{
				event_handler.add(selects[i], 'change', calendar.move);
			}
		}
	}
};
calendar.destroy = function (event)
{
	if (event)
	{
		var event = event_handler.fix(event);

		if (event.preventDefault)
		{
			event.preventDefault();
		}
	}

	var calendar_div = document.getElementById('javascript_calendar');

	if (calendar_div)
	{
		calendar_div.innerHTML = '';
		calendar_div.style.display = 'none';
	}

	calendar.invoked_by = null;

	return false;
};
calendar.fill_date = function (event)
{
	var event = event_handler.fix(event);

	if (event.preventDefault)
	{
		event.preventDefault();
	}

	var tmp_fill = event.target.id;
	var tmp_date = tmp_fill.split('-');

	var re = new RegExp('dd');
	day_long = (calendar.format.match(re)) ? true : false;

	var re = new RegExp('mm');
	month_long = (calendar.format.match(re)) ? true : false;

	var re = new RegExp('yyyy');
	year_long = (calendar.format.match(re)) ? true : false;

	var tmp_format = calendar.format;

	if (day_long)
	{
		var re = new RegExp('dd');
		tmp_format = tmp_format.replace(re, tmp_date[2]);
	}
	else
	{
		var re = new RegExp('d');
		tmp_format = tmp_format.replace(re, new Number(tmp_date[2]).valueOf());
	}

	if (month_long)
	{
		var re = new RegExp('mm');
		tmp_format = tmp_format.replace(re, tmp_date[1]);
	}
	else
	{
		var re = new RegExp('m');
		tmp_format = tmp_format.replace(re, new Number(tmp_date[1]).valueOf());
	}

	if (year_long)
	{
		var re = new RegExp('yyyy');
		tmp_format = tmp_format.replace(re, tmp_date[0]);
	}
	else
	{
		var re = new RegExp('yy');
		tmp_format = tmp_format.replace(re, tmp_date[0].substring(2, tmp_date[0].length));
	}

	calendar.invoked_by.value = tmp_format;

	var tmp_select_actions = (dom_handler.getProperties(calendar.select_action)) ? dom_handler.getProperties(calendar.select_action) : 0;
	if (tmp_select_actions.length > 0)
	{
		var has_run = false;

		for (var i = 0; i < tmp_select_actions.length; i++)
		{
			if (calendar.invoked_by.id == tmp_select_actions[i])
			{
				var tmp_functions = eval('calendar.select_action.'+tmp_select_actions[i]);
				if (tmp_functions.length > 0)
				{
					for (var j = 0; j < tmp_functions.length; j++)
					{
						var tmp_class = tmp_functions[j].split('.');
						if (tmp_class.length > 0)
						{
							if (eval('typeof('+tmp_class[0]+')') == 'undefined')
							{
								continue;
							}
						}

						if (eval('typeof('+tmp_functions[j]+')') != 'undefined')
						{
							var tmp_run = eval(tmp_functions[j]);
							tmp_run();
						}
					}
				}

				has_run = true;
			}
		}

		if (!has_run)
		{
			var tmp_functions = calendar.select_action.defaults;
			if (tmp_functions.length > 0)
			{
				for (var j = 0; j < tmp_functions.length; j++)
				{
					var tmp_class = tmp_functions[j].split('.');
					if (tmp_class.length > 0)
					{
						if (eval('typeof('+tmp_class[0]+')') == 'undefined')
						{
							continue;
						}
					}

					if (eval('typeof('+tmp_functions[j]+')') != 'undefined')
					{
						var tmp_run = eval(tmp_functions[j]);
						tmp_run();
					}
				}
			}
		}
	}

	calendar.invoked_by.focus();
	calendar.invoked_by.blur();
	calendar.destroy();

	return false;
};
calendar.clear = function (event)
{
	var event = event_handler.fix(event);

	if (event.preventDefault)
	{
		event.preventDefault();
	}

	calendar.invoked_by.value = '';

	calendar.destroy();

	return false;
};
calendar.move = function (event)
{
	var event = event_handler.fix(event);

	if (event.preventDefault)
	{
		event.preventDefault();
	}

	if (event.cancelBubble)
	{
		event.cancelBubble = true;
	}
	if (event.stopPropagation)
	{
		event.stopPropagation();
	}

	var selected_date = event.target.id;
	if (event.target.tagName.toLowerCase() == 'select')
	{
		selected_date = event.target.value;
	}

	var param = [];
	var p = 0;

	param[p] = ['element_id', calendar.invoked_by.id];
	p++;

	param[p] = ['language', calendar.language];
	p++;

	var tmp_lang = calendar.language.defaults;
	if (eval('typeof(calendar.language.'+calendar.invoked_by.id+')') != 'undefined')
	{
		tmp_lang = eval('calendar.language.'+calendar.invoked_by.id);
	}

	param[p] = ['lang', tmp_lang];
	p++;

	var tmp_clear = calendar.show_clear.defaults;
	if (eval('typeof(calendar.show_clear.'+calendar.invoked_by.id+')') != 'undefined')
	{
		tmp_clear = eval('calendar.show_clear.'+calendar.invoked_by.id);
	}

	param[p] = ['show_clear', tmp_clear];
	p++;

	var tmp_backward = calendar.backward_select.defaults;
	if (eval('typeof(calendar.backward_select.'+calendar.invoked_by.id+')') != 'undefined')
	{
		tmp_backward = eval('calendar.backward_select.'+calendar.invoked_by.id);
	}

	param[p] = ['backward_select', tmp_backward];
	p++;

	var tmp_includes = calendar.includes.defaults;
	if (eval('typeof(calendar.includes.'+calendar.invoked_by.id+')') != 'undefined')
	{
		tmp_includes = eval('calendar.includes.'+calendar.invoked_by.id);
	}

	param[p] = ['includes', tmp_includes];
	p++;

	if (eval('typeof(calendar.params.'+calendar.invoked_by.id+')') != 'undefined')
	{
		tmp_params = eval('calendar.params.'+calendar.invoked_by.id);
		for (var i = 0; i < tmp_params.length; i++)
		{
			param[p] = [tmp_params[i][0], eval(tmp_params[i][1])];
			p++;
		}
	}

	param[p] = ['format', calendar.format];
	p++;

	param[p] = ['date', selected_date];
	p++;

	var requester = new xmlhttp_handler;
	if (requester.loadURL('POST', calendar.source, param, false))
	{
		var content = requester.getText();

		var calendar_div = document.getElementById('javascript_calendar');
		calendar_div.innerHTML = '';
		calendar_div.innerHTML = content;

		var anchors = calendar_div.getElementsByTagName('a');
		for (var i = 0; i < anchors.length; i++)
		{
			if (class_handler.has(anchors[i], 'close_cal'))
			{
				event_handler.add(anchors[i], 'click', calendar.destroy);
			}
			if (class_handler.has(anchors[i], 'clear_cal'))
			{
				event_handler.add(anchors[i], 'click', calendar.clear);
			}
			if (class_handler.has(anchors[i], 'fill_date'))
			{
				event_handler.add(anchors[i], 'click', calendar.fill_date);
			}
			if (class_handler.has(anchors[i], 'move'))
			{
				event_handler.add(anchors[i], 'click', calendar.move);
			}
		}

		var selects = calendar_div.getElementsByTagName('select');
		for (var i = 0; i < selects.length; i++)
		{
			if (class_handler.has(selects[i], 'move'))
			{
				event_handler.add(selects[i], 'change', calendar.move);
			}
		}
	}

	return false;
};
calendar.setDateFormat = function (element_id)
{
	if (eval('typeof(calendar.date_format.'+element_id+')') != 'undefined')
	{
		calendar.format = eval('calendar.date_format.'+element_id);
	}
	else if (eval('typeof(calendar.date_format.'+calendar.language.defaults+')') != 'undefined')
	{
		calendar.format = eval('calendar.date_format.'+calendar.language.defaults);
	}
	else
	{
		calendar.format = calendar.date_format.defaults;
	}
};
calendar.windowClick = function (event)
{
	event = event_handler.fix(event);

	var element = event.target;
	if (element != calendar.invoked_by && calendar.invoked_by != null && element.id != 'cal_move_year'
	&& element.id != 'cal_move_month')
	{
		calendar.destroy();
	}
};