// JavaScript Document
// browser detectie
var agent = navigator.userAgent.toLowerCase();
var appVersion = navigator.appVersion.toLowerCase();

var isMac = (appVersion.indexOf("mac") != -1) ? true : false;
var isImg = (document.images) ? true : false;
var isAll = (document.all) ? true : false;
var isLay = (document.layers) ? true : false;
var isId = (document.getElementById && !document.all) ? true : false;
var opera6 = ((agent.indexOf("opera 6") != -1) ||  (agent.indexOf("opera/6") != -1)) ? true : false;
var opera7 = ((agent.indexOf("opera 7") != -1) ||  (agent.indexOf("opera/7") != -1)) ? true : false;
var isOpera6up = (opera6 && !opera7);
var isOpera7up = (!opera6 && opera7);