var gMaxTopicsSelected = 3;

function validateEmailAddress(email)
{
	// check . exists and is not last character
	var dotPos = email.lastIndexOf(".");
	var addrLen = email.length;
	if (dotPos == -1 || dotPos == (addrLen - 1)) return false;
	
	// check @ exists and is not first character
	var atPos = email.indexOf("@");
	if (atPos == -1 || atPos == 0) return false;
	
	// ensure @ comes before .
	if (atPos > dotPos) return false;
	
	// ensure @. aren't together
	if (dotPos - atPos == 1) return false;
	
	return true;
}

// load selected topics into display <select>
function loadSelectedTopicsOptions(language)
{
	var topicsField = document.forms[0].elements.namedItem("SelectedTopics");
	if ((topicsField == null) || (topicsField.value == "")) return;
	
	var topics = topicsField.value.split(";");
	
	var destSelect = document.forms[0].elements.namedItem("SelectedTopicsDisp");
	if (!destSelect) return;
	
	var topicNameIndex = (language == "fr" ? 1 : 0);
	
	for (var i = 0; i < topics.length; i++)
	{
		var topicComponents = topics[i].split("~");
		var newOption = document.createElement("option");
		newOption.text = trimSpaces(topicComponents[topicNameIndex]);
		newOption.value = topics[i];
	
		try
		{
			// standards compliant; doesn't work in IE
			destSelect.add(newOption, null);
		}
		catch (ex)
		{
			destSelect.add(newOption); // IE only
		}
	}
}

// capture selected topics before submitting form
function captureSelectedTopics()
{
	var topicsSelect = document.forms[0].elements.namedItem("SelectedTopicsDisp");
	var topicsString = "";
	var option;
	for (var i = 0; i < topicsSelect.length; i++)
	{
		option = topicsSelect.options[i];
		topicsString += option.value;
		
		// separate values by semicolons
		if (i < topicsSelect.length - 1)
		{
			topicsString += ";"
		}
	}

	var topicsField = document.forms[0].elements.namedItem("SelectedTopics");
	topicsField.value = topicsString;
}
// selecting topics, selecting is true if selecting a topic, false if deselecting
function selectTopic(selecting, language)
{
	if (selecting)
	{
/* 		2007-10-26: should not use getElementById(), */
		//var destSelect = document.getElementById("SelectedTopicsDisp");
		var destSelect = document.forms[0].elements.namedItem("SelectedTopicsDisp");
		if (destSelect.length >= gMaxTopicsSelected)
		{
			 if (language == "en") 
                        { 
                                alert("You have already reached the maximum of three topics."); 
                        } 
                        else 
                        { 
                                alert("Vous avez d\u00E9j\u00E0 choisi trois domaines (le maximum)."); 
                        }         
                        return;
		}
	
		var sourceSelect = document.forms[0].elements.namedItem("AvailableTopics");
	}
	else
	{
		var destSelect = document.forms[0].elements.namedItem("AvailableTopics");
		var sourceSelect = document.forms[0].elements.namedItem("SelectedTopicsDisp");
	}
	var option;
	var toRemove = new Object();
	
	for (var i = 0; i < sourceSelect.length; i++)
	{
		option = sourceSelect.options[i];
		if (option.selected)
		{
			// add to destination <select>
			var newOption = document.createElement("option");
			newOption.value = option.value;
			newOption.text = option.text;
			try
			{
				// standards compliant; doesn't work in IE
    				destSelect.add(newOption, null);
			}
			catch (ex)
			{
				destSelect.add(newOption); // IE only
			}
			
			// mark for removal
			toRemove[option.value] = "1";

			if (selecting && destSelect.length >= gMaxTopicsSelected) break;
		}
	}

	// remove options from source
	var noRemoval = false;
	
	while (!noRemoval)
	{
		noRemoval = true;
		for (i = 0; i < sourceSelect.length; i++)
		{
			option = sourceSelect.options[i];
			if (toRemove[option.value] == "1")
			{
				sourceSelect.remove(i);
				noRemoval = false;
			}
		}
		
	}
	
}

function rankTopic(direction)
{
	var slct = document.forms[0].elements.namedItem("SelectedTopicsDisp");
	var options;
	var option, tempValue, tempText;
	
	options = slct.options;
	for (var i = 0; i < options.length; i++)
	{
		option = options[i];
		if (option.selected)
		{
			if (direction == "up" && i > 0)
			{
				tempValue = options[i - 1].value;
				tempText = options[i - 1].text;
				options[i - 1].value = option.value;
				options[i - 1].text = option.text;
				options[i].value = tempValue;
				options[i].text = tempText;
				
				options[i].selected = false;
				options[i - 1].selected = true;
			}
			else if (direction == "down" && (i < options.length - 1))
			{
				tempValue = options[i + 1].value;
				tempText = options[i + 1].text;
				options[i + 1].value = option.value;
				options[i + 1].text = option.text;
				options[i].value = tempValue;
				options[i].text = tempText;
				
				options[i].selected = false;
				options[i + 1].selected = true;
			}
			
			break;
		}
	}
}
function trimSpaces(s)
{
	while (s.substr(0, 1) == " ") s = s.substr(1);
	return s;
}

function manageAddressFields(inOnLoad)
{
	// depending on country selected, enable, disable fields and
	// update province/state options
	
	/* 2007-10-26: should not use this to get Form fields where "Country" is just name, not ID: 
								document.getElementById("Country")  */
	// var countrySlct = document.getElementById("Country");
	var countrySlct = document.forms[0].elements.namedItem("Country");
	
	var country = countrySlct.options[countrySlct.selectedIndex].value;
	
	// enable/disable other country and other province fields
	
	/* 2007-10-26: should not use this to get Form fields where "Country" is just name, not ID: 
					all changed to use form elements collection
	*/
	var otherCountryField = document.forms[0].elements.namedItem("OtherCountry");
	var otherProvinceField = document.forms[0].elements.namedItem("OtherProvince");
	var provinceSlct = document.forms[0].elements.namedItem("Province");

	if (country != "other")
	{
		otherCountryField.value = "";
		otherCountryField.disabled = true;
		otherProvinceField.value = "";
		otherProvinceField.disabled = true;
	}
	else
	{
		otherCountryField.disabled = false;
		otherProvinceField.disabled = false;
	}
	
	// if not in onLoad() event, refresh province combo box options
	if (!inOnLoad)
	{
		// clear out current options
		while (provinceSlct.options.length > 0) provinceSlct.remove(0);
		
		if (country != "other")
		{
			provinceSlct.disabled = false;
			
			var optionsField = (country == "CA" ? "provinces" : "states");
			
			/* 2007-10-26: it is not correct to use getElementById() to access form fields by name - IE only */
			// var values = document.getElementById(optionsField).value.split(";");
			var values = document.forms[0].elements.namedItem(optionsField).value.split(";");
			
			for (i = 0; i < values.length; i++)
			{
				var newOption = document.createElement("option");
				newOption.value = values[i];
				newOption.text = values[i];
				try
				{
					// standards compliant; doesn't work in IE
	    				provinceSlct.add(newOption, null);
				}
				catch (ex)
				{
					provinceSlct.add(newOption); // IE only
				}
			}
			
		}
		else
		{
			provinceSlct.disabled = true;
			// do nothing for other country, checkbox disabled above
		}
	}
	else
	{
		// correct options already loaded server-side by Domino
	}
}