// name - name of the cookie
// value - value of the cookie
// [expires] - expiration date of the cookie (defaults to end of current session)
// [path] - path for which the cookie is valid (defaults to path of calling document)
// [domain] - domain for which the cookie is valid (defaults to domain of calling document)
// [secure] - Boolean value indicating if the cookie transmission requires a secure transmission
// * an argument defaults when it is assigned null as a placeholder
// * a null placeholder is not required for trailing omitted arguments

function setCookie(name, value, expires, path, domain, secure) {

//	window.status = 'Setting cookie: ' + name + ' = ' + value;
	
  var curCookie = name + "=" + escape(value) +
      ((expires) ? "; expires=" + expires.toGMTString() : "") +
      ((path) ? "; path=" + path : "") +
      ((domain) ? "; domain=" + domain : "") +
      ((secure) ? "; secure" : "");
  document.cookie = curCookie;
}

// name - name of the desired cookie
// * return string containing value of specified cookie or null if cookie does not exist

function getCookie(name) {
  var dc = document.cookie;
  var prefix = name + "=";
  var begin = dc.indexOf("; " + prefix);
  if (begin == -1) {
    begin = dc.indexOf(prefix);
    if (begin != 0) return null;
  } else
    begin += 2;
  var end = document.cookie.indexOf(";", begin);
  if (end == -1)
    end = dc.length;
  return unescape(dc.substring(begin + prefix.length, end));
}

// name - name of the cookie
// [path] - path of the cookie (must be same as path used to create cookie)
// [domain] - domain of the cookie (must be same as domain used to create cookie)
// * path and domain default if assigned null or omitted if no explicit argument proceeds

function deleteCookie(name, path, domain) {
  if (getCookie(name)) {
    document.cookie = name + "=" +
    ((path) ? "; path=" + path : "") +
    ((domain) ? "; domain=" + domain : "") +
    "; expires=Thu, 01-Jan-70 00:00:01 GMT";
  }
}

// date - any instance of the Date object
// * hand all instances of the Date object to this function for "repairs"

function fixDate(date) {
  var base = new Date(0);
  var skew = base.getTime();
  if (skew > 0)
    date.setTime(date.getTime() - skew);
}


function checkMenuCookie(psCategory, psCode) {

	var sCodes = '';
	
	switch(psCategory){
		
		case 'Species':
		{
			sCodes = gSpeciesSetting;

			if (sCodes.indexOf(psCode) >= 0)
				return('T');
			else
				return('F');		
		}		

		case 'StructureType':
		{
			sCodes = gStructureTypeSetting;
			if (sCodes.indexOf(psCode) >= 0)
				return('T');
			else
				return('F');		
		}		

		case 'TimeOfYear':
		{
			sCodes = gTimeOfYearSetting;
			if (sCodes.indexOf(psCode) >= 0)
				return('T');
			else
				return('F');		
		}		
		
	}
	
}

function OLD_checkMenuCookie(psCategory, psCode, psDefault) 
{
	
	var sCodes = getCookie(psCategory);
	
	if (!sCodes)
		return(psDefault);
	else
	{
		if (sCodes.indexOf(psCode) >= 0)
			return('T');
		else
			return('F');		
	}
}