// ********************
// * ARRAY EXTENSIONS
// * Additional methods:
// * - indexOf( e ): returns index of element 'e'; -1 if not found
// * - getUnique(): returns a copy of the array with duplicate elements removed
// *********************
function indexOf( e )
{
	var i;
	
	if( typeof e != typeof this[0] )
	{
		return -1;
	}
	
	for( i = 0; i < this.length; i++ )
	{
		if( this[i] == e )
		{
			return i;
		}
	}
	
	return -1;
}

Array.prototype.indexOf = indexOf;

function getUnique()
{
	var unique = new Array();
	var i;
	
	for( i = 0; i < this.length; i++ )
	{
		if( unique.indexOf( this[i] ) < 0 )
		{
			unique[unique.length] = this[i];
		}
	}
	
	return unique;
}

Array.prototype.getUnique = getUnique;
// *********************
// * END ARRAY EXTENSIONS
// *********************


// ********************
// * COOKIE FUNCTIONS
// *********************
// 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) {
  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";
  }
}
// ********************
// * END COOKIE FUNCTIONS
// *********************