/* -----------------------------------------------------------------------------------------------------
 * Browser segment.
 * --------------------------------------------------------------------------------------------------- */
var NN4 = document.layers? true : false;
var IE4 = document.all? true : false;
var NN6 = document.getElementById? true : false;
var IE5 = NN6;
var MOZ = NN6;
var NN3 = ((navigator.appVersion.charAt(0) == '3') && (navigator.appName.charAt(0) == 'N'));

/* -----------------------------------------------------------------------------------------------------
 * OS segment.
 * --------------------------------------------------------------------------------------------------- */
var MAC = (navigator.appVersion.indexOf("Mac", 0) != -1)? true : false;