// Copyright 2003-2008 by Gary Kensok

var usrAgent = navigator.userAgent.toLowerCase();
var usrMajor = parseInt(navigator.appVersion);
var usrMinor = parseFloat(navigator.appVersion);

var isIE     = ((usrAgent.indexOf('msie') != -1) && (usrAgent.indexOf('opera') == -1));
var isFF     = (usrAgent.indexOf('firefox') != -1);
var isOpera  = (usrAgent.indexOf('opera') != -1);
var isGecko  = (usrAgent.indexOf('gecko') != -1);

function isArray(obj) {
  return obj && typeof obj == 'object' && obj.constructor == Array;
}
function isBoolean(obj) {
  return typeof obj == 'boolean';
}
function isFunction(obj) {
  return typeof obj == 'function';
}
function isNumber(obj) {
  return typeof obj == 'number'; // && isFinite(obj);
}
function isString(obj) {
  return typeof obj == 'string';
}
function isObject(obj) {
  return obj && (typeof obj == 'object' || typeof obj == 'function');
}
function isUndefined(obj) {
  return typeof obj == 'undefined';
} 
function isEmpty(obj) {
  var i, v;
  if (isObject(obj)) {
    for (i in obj) {
      v = obj[i];
      if (isUndefined(v) && isFunction(v)) {
        return false;
      }
    }
  }
  else if (isString(obj)) {
    return obj.length == 0;
  }
  return true;
}

// Cookies

function SetCookie(name,value) {
  // 8-6-06: For now, clear default path cookie, if present
  // 8-6-06: Also, IE6 keeps the previous value around, until IE exit
  document.cookie = name + "=; expires=01-Jan-70 00:00:01 GMT";

  var expires = new Date();
  var year = expires.getFullYear();
  expires.setFullYear(year+1);
  document.cookie = name + "=" + value +
                    "; expires=" + expires.toGMTString() +
                    "; path=/"; // + (path != '' ? path : '/');
  //alert(DumpCookies());
}
function GetCookie(name) {
  //alert(DumpCookies());
  var value  = null;
  var cookies = document.cookie.split(';');
  var prefix = name + '=';
  for (i = 0; i < cookies.length; i++) {
    var cookie = cookies[i];
    if (cookie.charAt(0) == ' ')
      cookie = cookie.substring(1,cookie.length);
    if ((index = cookie.indexOf(prefix)) == 0) {
      value = cookie.substring(index+prefix.length);
      // 8-6-06: ignore the old deleted value
      //if (value != '') break;
    }
  }
  return value;
}
function DeleteCookie(name) {
  document.cookie = name + "=; expires=01-Jan-70 00:00:01 GMT; path=/";
  // 8-6-06: For now, clear default path cookie, too
  document.cookie = name + "=; expires=01-Jan-70 00:00:01 GMT";
}
function DumpCookies() {
  var result  = document.cookie;
  var cookies = document.cookie.split(';');
  for (i = 0; i < cookies.length; i++) {
    var cookie = cookies[i];
    if (cookie.charAt(0) == ' ')
      cookie = cookie.substring(1,cookie.length);
    result += "\n"+i+": "+cookie;
  }
  return result;
}