function trimMultiValue(val) {
// given a string of values e.g val1; val2; val3; ... return val1;val2;val3;... (remove spaces)
	while (val.indexOf("; ") != -1) {
		val = val.replace("; ", ";");
	}
	return val;
}

function toggleSubscription(anchor, id, name) {
	var doc = document.forms[0];
	
	var addAry = doc.SubscriptionsAdd.value.split("; ");
	var removeAry = doc.SubscriptionsRemove.value.split("; ");
	var currentIds = doc.SubscriptionsIDs.value.split("; ");
	var changeIds =  doc.SubscriptionsChange.value.split("; ");
	
	var addAry2 = new Array();
	var removeAry2 = new Array();
	var addAryIds = new Array();
	var addAryTitles = new Array();
	var removeAryTitles = new Array();
	
	if (anchor.innerText == "unsubscribe" || anchor.innerText == "D\u00E9sabonnez-moi") {

		//*** UN-SUBSCRIBE
		anchor.disabled = true;

		//add to the remove ary
		if (arrayGetIndex(currentIds, id) != -1 && arrayGetIndex(removeAry, name + "|" + id) == -1) {
			removeAry[removeAry.length] = name + "|" + id;
			changeIds[arrayGetIndex(changeIds, id)] = "";
		} else {
			return;
		}
		
		//remove it from the add ary
		for (var i=0; i<addAry.length; i++) {
			if (addAry[i] != null && addAry[i] != "" && addAry[i] != name + "|" + id ) {
				addAry2[addAry2.length] = addAry[i];
				addAryIds[addAryIds.length] = addAry[i].substring(addAry[i].indexOf("|")+1);
				addAryTitles[addAryTitles.length] = addAry[i].substring(0, addAry[i].indexOf("|"));
			}
		}

		//rebuild the remove aray
		for (var i=0; i<removeAry.length; i++) {
			if (removeAry[i] != null && removeAry[i] != "") {
				removeAry2[removeAry2.length] = removeAry[i];
				removeAryTitles[removeAryTitles.length] = removeAry[i].substring(0, removeAry[i].indexOf("|"));
			}
		}
		
	} else {	
		//*** SUBSCRIBE
		anchor.disabled = true;
		
		//add to the add ary
		if (arrayGetIndex(currentIds, id) == -1 && arrayGetIndex(addAry, name + "|" + id) == -1) {		
			addAry[addAry.length] = name + "|" + id;
			changeIds[changeIds.length] = id;
		} else {
			return;
		}
		
		//remove it from the remove ary
		for (var i=0; i<removeAry.length; i++) {
			if (removeAry[i] != null && removeAry[i] != "" && removeAry[i] != name + "|" + id ) {
				removeAry2[removeAry2.length] = removeAry[i];
				removeAryTitles[removeAryTitles.length] = removeAry[i].substring(0, removeAry[i].indexOf("|"));
			}
		}
		//rebuild the add aray
		for (var i=0; i<addAry.length; i++) {
			if (addAry[i] != null && addAry[i] != "") {
				addAry2[addAry2.length] = addAry[i];
				addAryIds[addAryIds.length] = addAry[i].substring(addAry[i].indexOf("|")+1);
				addAryTitles[addAryTitles.length] = addAry[i].substring(0, addAry[i].indexOf("|"));
			}
		}
	}								

	doc.SubscriptionsAdd.value = addAry2.join("; ");
	doc.SubscriptionsRemove.value = removeAry2.join("; ");
	doc.SubscriptionsChange.value = changeIds.join("; ");
	
	document.getElementById("reqAdd").innerText = addAryTitles.join("\n");
	document.getElementById("reqRemove").innerText = removeAryTitles.join("\n");
		
}


function arrayGetIndex(ary, elem) {
	for (var i=0; i<ary.length; i++) {
		if (ary[i] == elem) return i;
	}
	return -1;
}


function subscriptionsOnClick() {
	var doc = document.forms[0];
	// clear the existing values; reset in this function every time
	doc.SubscriptionsAdd.value = "";
	doc.SubscriptionsRemove.value = "";
	// get all checkboxes
	var checks = document.getElementsByName("SubscriptionsChange");
	// get start values as array (IDs)
	var startValsStr = doc.SubscriptionsStart.value;
	startValsStr = trimMultiValue(startValsStr);
	var startVals = startValsStr.split(";");
	var found = false;
	var reqAdd = new Array();
	var reqRemove = new Array();
	// for each check, add to the add/remove fields as necessary based on start value
	for (var i=0; i<checks.length; i++) {
		found = false;
		var check = checks[i];
		if (check.checked) {
			for (var k=0; k<startVals.length; k++) {
				if (check.value == startVals[k].split("|")[0]) {
					found = true;
					break;
				}
			}
			if (!found) {
				// add
				doc.SubscriptionsAdd.value += check.nextSibling.innerText + "|" + check.value + ";";
				reqAdd[reqAdd.length] = check.nextSibling.innerText;
			}
		} else {
			for (var k=0; k<startVals.length; k++) {
				if (check.value == startVals[k].split("|")[0]) {
					found = true;
					break;
				}
			}
			if (found) {
				// remove
				doc.SubscriptionsRemove.value += check.nextSibling.innerText + "|" + check.value + ";";
				reqRemove[reqRemove.length] = check.nextSibling.innerText;
			}
		}
	}
	// set UI display
	document.getElementById("reqAdd").innerText = reqAdd.join("\n");
	document.getElementById("reqRemove").innerText = reqRemove.join("\n");
}

// check/uncheck all options in a specified checkbox
function checkboxes(chkbox, checked)
{
	for (var i = 0; i < chkbox.length; i++)
	{
		chkbox[i].checked = checked;
	}
}

/*********
* NEW SUBSCRIPTION STUFF - ERIC
**********/
function loadAllSubscriptionDivs()
{
	var labels = new Array();
	
	// determine link labels based on global language value
	if (gLang == "fr")
	{
		labels["unsubscribe"] = "D\u00E9sabonnez-moi";
		labels["subscribe"] = "Abonnez-moi";
		labels["cancelAdd"] = "Annulez";
		labels["cancelRemove"] = "Annulez";
	}
	else
	{
		labels["unsubscribe"] = "unsubscribe";
		labels["subscribe"] = "subscribe";
		labels["cancelAdd"] = "cancel";
		labels["cancelRemove"] = "cancel";
	}
	
	// selected
	loadSubscriptionDiv("SubscriptionsIDs", "unsubscribe", labels["unsubscribe"],
	"selectedSubs");
	// available
	loadSubscriptionDiv("SubscriptionsAvailable", "subscribe", labels["subscribe"],
	"availableSubs");
	// add
	loadSubscriptionDiv("SubscriptionsAdd", "cancelAdd", labels["cancelAdd"],
	"reqAdd");
	// remove
	loadSubscriptionDiv("SubscriptionsRemove", "cancelRemove", labels["cancelRemove"],
	"reqRemove");
}
function loadSubscriptionDiv(fieldName, fnName, opName, divName)
{	
	/* 2007-10-26: getElementById(fieldName) is broken in Firefox, should use the form element*/
	/* // available
	var field = document.getElementById(fieldName);
	*/
	var field = document.forms[0].elements.namedItem(fieldName);
	
	//alert("form " + document.forms[0].name + ", " + fieldName + ": " + (field==null ? "is null" : "name=" + (field.name)) );	
	var ids = trimMultiValue(field.value);
	
	var html = "<table>";
	
	if (ids != "")
	{
		ids = ids.split(";");
		for (var i = 0; i < ids.length; i++)
		{
			html += "<tr><td>";
			var id = ids[i];
			html += gSubscriptions[id] + "&nbsp;&nbsp;</td><td style=\"width:100px;text-align:center\"><a href=\"javascript:" + fnName + "('"
			+ id + "')\">" + opName + "</a></td></tr>";
		}
	}
	html += "</table>";

	var div = document.getElementById(divName);
	div.innerHTML = html;
}
function subscribe(id)
{
	moveId(id, "SubscriptionsAvailable", "SubscriptionsAdd");
	loadAllSubscriptionDivs();
}

function unsubscribe(id)
{
	moveId(id, "SubscriptionsIDs", "SubscriptionsRemove");
	loadAllSubscriptionDivs();
}

function cancelAdd(id)
{
	moveId(id, "SubscriptionsAdd", "SubscriptionsAvailable");
	loadAllSubscriptionDivs();
}

function cancelRemove(id)
{
	moveId(id, "SubscriptionsRemove", "SubscriptionsIDs");
	loadAllSubscriptionDivs();
}

function moveId(id, source, dest)
{
	var field = document.forms[0].elements.namedItem(source);
	var x = field.value.split("; ");
	x = removeElement(x, id);
	field.value = x.join("; ");
	
	field = document.forms[0].elements.namedItem(dest);
	x = field.value;
	
	if (x == "")	x = id;
	else			x += "; " + id;
	field.value = x;
}
function removeElement(arr, elem)
{
	var retval = new Array();
	var i, j = 0;
	
	for(i = 0; i < arr.length; i++)
	{
		if (arr[i] != elem) retval[j++] = arr[i];
	}
	
	return retval;
}