var Browser; 
var os;
Browser=navigator.appName;
if (Browser == "Microsoft Internet Explorer") {os = "IE"} 
if (Browser == "Netscape") {os = "NN"} 

var ie4flg = (document.all) ? 1:0;
var geckoflg=(navigator.userAgent.indexOf('Gecko') > -1) ? 1:0;
var op6flg=(navigator.userAgent.indexOf('Opera/6') > -1) ? 1:0;
var op7flg=(navigator.userAgent.indexOf('Opera/7') > -1) ? 1 : (navigator.userAgent.indexOf('Opera 7') > -1) ? 1:0;
var ns4flg=(navigator.userAgent.indexOf('Mozilla/4.7') > -1) ? 1:0;
var sfflg=(navigator.userAgent.indexOf('Safari') > -1) ? 1:0;