/**
 * handle state selections on forms for countries which have states/territories
 */

// when document is ready
$(document).ready(function() {
	// new country selection causes list to be updated and hidden/shown
	$("#country").change(function() {
		showHideStateSelection();
	});
	// initial run
	showHideStateSelection();
});

/**
 * Show or hide the div containin the state/territory selection 
 * dependin on whether we need it.
 * 
 * Currently we only have state/territory selection for the US and CA
 */
function showHideStateSelection() {
	var countryBox = document.forms.gfimaxform.country;
	var countryCode = countryBox.options[countryBox.selectedIndex].value;
	var stateBox = document.forms.gfimaxform.state;
	var aStates = getStateList(countryCode);
	if (aStates.length == 0) {
		stateBox.disabled = true;
		// make selection of state non-mandatory if states are not shown
		stateBox.setAttribute("alt", "");
		$("#state_choice_div").hide();
	} else {
		stateBox.disabled = false;
		// make selection of state mandatory if states are shown
		stateBox.setAttribute("alt", "select");
		// retain "please select..."
		stateBox.options.length = 1;
		for (var i = 0; i<aStates.length; i++) {
			stateBox.options[i+1] = new Option(
					aStates[i]['state'],	// label
					aStates[i]['code']);	// value
		}
		$("#state_choice_div").show();
	}
}

/**
 * get a list of States
 *
 * @param countryCode country code
 * @return Array (numeric) of Arrays (associative), keys: code, state
 */
function getStateList(countryCode) {
	var aStates = new Array();
	switch (countryCode) {
		case 'us':
			aStates = getUSList();
			break;
		case 'ca':
			aStates = getCAList();
			break;
	}
	return aStates;
}

/**
 * get a list of US States
 *
 * @return Array (numeric) of Arrays (associative), keys: code, state
 */
function getUSList() {
	var aStates = eval('[\
	{"code":"US-AL","state":"Alabama"},\
	{"code":"US-AK","state":"Alaska"},\
	{"code":"US-AS","state":"American Samoa"},\
	{"code":"US-AZ","state":"Arizona"},\
	{"code":"US-AR","state":"Arkansas"},\
	{"code":"US-CA","state":"California"},\
	{"code":"US-CO","state":"Colorado"},\
	{"code":"US-CT","state":"Connecticut"},\
	{"code":"US-DE","state":"Delaware"},\
	{"code":"US-DC","state":"District of Columbia"},\
	{"code":"US-FL","state":"Florida"},\
	{"code":"US-GA","state":"Georgia"},\
	{"code":"US-GU","state":"Guam"},\
	{"code":"US-HI","state":"Hawaii"},\
	{"code":"US-ID","state":"Idaho"},\
	{"code":"US-IL","state":"Illinois"},\
	{"code":"US-IN","state":"Indiana"},\
	{"code":"US-IA","state":"Iowa"},\
	{"code":"US-KS","state":"Kansas"},\
	{"code":"US-KY","state":"Kentucky"},\
	{"code":"US-LA","state":"Louisiana"},\
	{"code":"US-ME","state":"Maine"},\
	{"code":"US-MD","state":"Maryland"},\
	{"code":"US-MA","state":"Massachusetts"},\
	{"code":"US-MI","state":"Michigan"},\
	{"code":"US-MN","state":"Minnesota"},\
	{"code":"US-MS","state":"Mississippi"},\
	{"code":"US-MO","state":"Missouri"},\
	{"code":"US-MT","state":"Montana"},\
	{"code":"US-NE","state":"Nebraska"},\
	{"code":"US-NV","state":"Nevada"},\
	{"code":"US-NH","state":"New Hampshire"},\
	{"code":"US-NJ","state":"New Jersey"},\
	{"code":"US-NM","state":"New Mexico"},\
	{"code":"US-NY","state":"New York"},\
	{"code":"US-NC","state":"North Carolina"},\
	{"code":"US-ND","state":"North Dakota"},\
	{"code":"US-MP","state":"Northern Mariana Islands"},\
	{"code":"US-OH","state":"Ohio"},\
	{"code":"US-OK","state":"Oklahoma"},\
	{"code":"US-OR","state":"Oregon"},\
	{"code":"US-PA","state":"Pennsylvania"},\
	{"code":"US-PR","state":"Puerto Rico"},\
	{"code":"US-RI","state":"Rhode Island"},\
	{"code":"US-SC","state":"South Carolina"},\
	{"code":"US-SD","state":"South Dakota"},\
	{"code":"US-TN","state":"Tennessee"},\
	{"code":"US-TX","state":"Texas"},\
	{"code":"US-UM","state":"United States Minor Outlying Islands"},\
	{"code":"US-VI","state":"United States Virgin Islands"},\
	{"code":"US-UT","state":"Utah"},\
	{"code":"US-VT","state":"Vermont"},\
	{"code":"US-VA","state":"Virginia"},\
	{"code":"US-WA","state":"Washington"},\
	{"code":"US-WV","state":"West Virginia"},\
	{"code":"US-WI","state":"Wisconsin"},\
	{"code":"US-WY","state":"Wyoming"}]'); // a coma after last '}' causes error in IE
	return aStates;
}

/**
 * get a list of Canada States
 *
 * @return Array (numeric) of Arrays (associative), keys: code, state
 */
function getCAList() {
	var aStates = eval('[\
	{"code":"CA-AB","state":"Alberta"},\
	{"code":"CA-BC","state":"British Columbia"},\
	{"code":"CA-MB","state":"Manitoba"},\
	{"code":"CA-NB","state":"New Brunswick"},\
	{"code":"CA-NL","state":"Newfoundland and Labrador"},\
	{"code":"CA-NT","state":"Northwest Territories"},\
	{"code":"CA-NS","state":"Nova Scotia"},\
	{"code":"CA-NU","state":"Nunavut"},\
	{"code":"CA-ON","state":"Ontario"},\
	{"code":"CA-PE","state":"Prince Edward Island"},\
	{"code":"CA-QC","state":"Quebec"},\
	{"code":"CA-SK","state":"Saskatchewan"},\
	{"code":"CA-YT","state":"Yukon Territory"}]'); // a coma after last '}' causes error in IE
	return aStates;
}