function fieldFromCookie(fieldName, cookieName, defValue)
{
	var savedFields = getCookie("saved");
	if (savedFields != null) {
		oldval = ExtractField(cookieName, ',', savedFields);
		if (oldval != null) defValue = oldval;
		}
	if (defValue != null)
		document.getElementById(fieldName).value = defValue;
}

function rememberField(fieldName, cookieName)
{
	var oldval = document.getElementById(fieldName).value;
	var savedFields = getCookie("saved");
	savedFields = ReplaceField(cookieName, ',', savedFields, oldval);
	setCookie("saved", savedFields, expireDate);
}

function recentFromSelect(event)
{
    var selector;

  	// Find event object:
  	if(!event) event = window.event;
  	if(!event) return;
  	// Find event target (input element):
  	selector = event.srcElement || event.currentTarget || event.target;
  	if(!selector) return;

	var newVal = selector.options[selector.selectedIndex].value;
//	alert("new val" + newVal);
	if (newVal == "") return;
	if (newVal == "Clear") {
		selector.options.length = 1;
		selector.options[selector.length] = new Option("Clear List", "Clear", false, false);
		selector.selectedIndex = 0;
		if (getCookie(selector.cookieName) != null)
			setCookie(selector.cookieName, "", null);
		return(false);
		}
	var fieldNameList = selector.formFieldList.split(",");
	var menuFieldAbbr = selector.formFieldAbbr.split(",");
	for (i = 0; i < fieldNameList.length; ++i) {
		var fieldName = selector.formPrefix + fieldNameList[i];
		fieldVal = ExtractField(menuFieldAbbr[i], ',' ,newVal);
		if (fieldVal == null) fieldVal = "";
//		alert("set val " + fieldVal);
		selector.form.elements[selector.formPrefix + fieldNameList[i]].value = fieldVal;
		}
	selector.selectedIndex = 0;
}
	
function buildRecentMenu(selector, title, cookieName, formFieldList, formFieldAbbr, formPrefix, maxHist)
{
	selector.options[selector.length] = new Option(title, "", false, false);
	selector.onchange = recentFromSelect;
	selector.cookieName = cookieName;
	selector.formFieldList = formFieldList;
	selector.formFieldAbbr = formFieldAbbr;
	selector.formPrefix = formPrefix;
	selector.maxHist = maxHist;
	var menuFieldAbbr;
	
	recentlist = getCookie(cookieName);
	if (recentlist != null) {
		menuFieldAbbr = formFieldAbbr.split(",");
		recentlistEntries = recentlist.split("|");
		for (i = 0; i < recentlist.length; ++i) {
			recentlistEntry = recentlistEntries[i];
			if (recentlistEntry) {
				menuname = ExtractField(menuFieldAbbr[0], ',', recentlistEntry);
				if (menuname != null)
					selector.options[selector.length] = new Option(menuname, recentlistEntry, false, false);
				}
			}
		}
	selector.options[selector.length] = new Option("Clear List", "Clear", false, false);
}


function saveRecent(selector)
{
	var fieldNameList = selector.formFieldList.split(",");
	var fieldAbbrList = selector.formFieldAbbr.split(",");
	cookieName = selector.cookieName;
	for (i = 0; i < fieldNameList.length; ++i) {
		var fieldName = selector.formPrefix + fieldNameList[i];
		fieldVal = selector.form.elements[fieldName].value;
		if (i == 0) {
			uniqueName = fieldVal;
			if (uniqueName.length == 0) return;
			}
		if (fieldVal.length == 0) continue;
		newEntryVal = ((i == 0) ? "" : newEntryVal + ",") + fieldAbbrList[i] + "=" + escapeFieldSet(fieldVal);
//			alert("newEntryVal "  + newEntryVal);
		}
	var nextCookieNum = 0;
	var newCookieVal = "";
	var newName = uniqueName;
	for (i = 1; i < selector.length; ++i) {
		nextValue = selector.options[i].value;
		nextName = selector.options[i].text;
		if (newEntryVal != null) {
		//	alert("set entry " + nextCookieNum + " to " + newEntryVal);
			if (newCookieVal.length + newEntryVal.length < 2048) {
				if (newCookieVal.length) newCookieVal += '|';
				newCookieVal += newEntryVal
				selector.options[nextCookieNum+1].value = newEntryVal;
				selector.options[nextCookieNum+1].text = newName;
				nextCookieNum++;
				}
			}
		if (nextValue == "Clear") break;
//		alert(selector.options[i].text);
		if (nextName != uniqueName && i < selector.maxHist) {
			newEntryVal = nextValue;
			newName = nextName;
			}
		else newEntryVal = null;
		}
//	alert("ncNum " + nextCookieNum + " selector.length " + selector.length);
	if (nextCookieNum >= selector.length - 1)
		selector.options[selector.length] = new Option("Clear List", "Clear", false, false);
	setCookie(cookieName, newCookieVal, expireDate);		
}	

function ExtractField(fieldname, delim, dataStr)
{
	var ni, ei;
	
	fieldname = fieldname + "=";
	if ((ni = dataStr.indexOf(fieldname)) >= 0 && (ni == 0 || dataStr.charAt(ni-1) == delim)) {
		ei = dataStr.indexOf(delim, ni);
		if (ei < 0) ei = dataStr.length;
		return unescapeFieldSet(dataStr.substring(ni + fieldname.length, ei));
		}
	return null;
}

function ReplaceField(fieldname, delim, dataStr, newvalue)
{
	var ni, ei;
	
	fieldname = fieldname + "=" 
	newStr = "";
	if (dataStr != null && (ni = dataStr.indexOf(fieldname)) >= 0 && (ni == 0 || dataStr.charAt(ni-1) == delim)) {
		ei = dataStr.indexOf(delim, ni);
		if (ni != 0) {
			if (ei < 0) --ni;
			newStr = dataStr.substring(0, ni);
			}
		if (ei > 0)
			newStr += dataStr.substring(ei+1);
		}
	else if (dataStr != null)
		newStr = dataStr;
		
	if (newStr.length != 0) {
		newStr += ","
		}
	newStr += fieldname + escapeFieldSet(newvalue);
	return newStr;
}

function setTextFromMenu(selector, fieldname)
{
	var textfield = selector.form.elements[fieldname];
	var newVal = selector.options[selector.selectedIndex].text;
	if (newVal.length != 0) {
		textfield.value = selector.options[selector.selectedIndex].text;
		selector.selectedIndex = 0;
		}
}

function escapeFieldSet(value)
{
	value = value.replace(/-/g, "-0");
	value = value.replace(/,/g, "-1");
	value = value.replace(/=/g, "-2");
	value = value.replace(/\|/g, "-3");
	return(value);
}

function unescapeFieldSet(value)
{
	value = value.replace(/-1/g, ",");
	value = value.replace(/-2/g, "=");
	value = value.replace(/-3/g, "|");
	value = value.replace(/-0/g, "-");
	return(value);
}

var expireDate = new Date("December 31, 2020");
// Set and get cookie values. Expiration date is optional
function setCookie(name, value, expire, secure) {
   document.cookie = name + "=" + escape(value)
   + ((expire == null) ? "" : ("; expires=" + expire.toGMTString()))
   + ((secure == null) ? "" : "; secure");
}

function getCookie(Name) {
   var search = Name + "="
   if (document.cookie.length > 0) { // if there are any cookies
	  offset = document.cookie.indexOf(search);
	  if (offset != -1) { // if cookie exists 
		 offset += search.length;
		 // set index of beginning of value
		 end = document.cookie.indexOf(";", offset);
		 // set index of end of cookie value
		 if (end == -1) 
			end = document.cookie.length;
		 return unescape(document.cookie.substring(offset, end));
	  	}
	  }	
  return null;
}