var CookieHelper = Class.create();
CookieHelper.prototype = {
  initialize: function( ){}
},
CookieHelper.setCookie = function( name, value, days, path ){
  if( days ){
    var date = new Date();
    date.setTime( date.getTime() + (days*24*60*60*1000) );
    var expires = "; expires=" + date.toGMTString();
  }
  if( !path ){
    path = "/";
  }
  else var expires = "";
  document.cookie = name + "=" + value + expires + "; path=/";
};

CookieHelper.getCookie = function( name ) {
  var nameEQ = name + "=";
  var ca = document.cookie.split( ';' );
  for( var i=0;i < ca.length;i++ ) {
    var c = ca[i];
    while( c.charAt(0)==' ' ){
      c = c.substring(1,c.length);
    } 
    if( c.indexOf(nameEQ) == 0 ){
      return c.substring( nameEQ.length, c.length );
    }
  }
  return null;
};

CookieHelper.getAllCookies = function( ){
	var rv = [];
  var split = document.cookie.split( ';' );
  var pattern_name    = /^[^=]+/;
  var pattern_value   = /[^=]+$/;
  var pattern_nospace = /[^\s]+/;
  var resultName;
  var resultValue;
  for( var i=0; (i < split.length); i++ ) {
    var name = split[i].match( pattern_name );
		if( name ){
	    name = name[0].match( pattern_nospace );
	    var value = split[i].match( pattern_value );
	    value = value[0].match( pattern_nospace );
	    var nv = new Object();
			nv.name = name;
			nv.value = value;
			rv.push( nv );
		}
  }
	return rv;
}

CookieHelper.getCookieValues = function( re ){
	var rv = [];
	var cookie_nvs = CookieHelper.getAllCookies();
  for( var i=0; (i < cookie_nvs.length); i++ ){
    var nv = cookie_nvs[i];
		var name = nv.name.toString();
		if( name.match(re) ){
			rv.push( nv.value );
		}
	}
	return rv;
}

CookieHelper.eraseCookie = function( name ){
  CookieHelper.setCookie( name, "", -1 );
};