var Mac = navigator.appVersion.indexOf('Mac',0) != -1;
var Win = navigator.appVersion.indexOf('Win',0) != -1;
var IE  = navigator.appName.indexOf("Microsoft Internet Explorer",0) != -1;
var NN  = navigator.appName.indexOf("Netscape",0) != -1;
var Moz = navigator.userAgent.indexOf("Gecko") != -1;
var Vmajor = parseInt(navigator.appVersion); // ex. 3
var Vminor = parseFloat(navigator.appVersion); // ex. 3.01
var WinIE = (Win && IE);
var MacIE5 = ((Mac && navigator.appVersion.indexOf('MSIE 5',0) != -1) || (Mac && IE && VER > 4));


var MacIE4 = ((Mac && navigator.appVersion.indexOf('MSIE 4.',0) != -1));
var MacIE3 = ((Mac && navigator.appVersion.indexOf('MSIE 3.',0) != -1));

var bAgent = navigator.userAgent;
var d = document;
function sniffer(){
this.Win = bAgent.indexOf("Win",0) != -1 ? 1 :0;
this.Mac = bAgent.indexOf("Mac",0) != -1 ? 1 :0;
this.Moz = ((bAgent.indexOf("Gecko") != -1) && (bAgent.indexOf("Safari",0) == -1)) ? 1 :0;
this.OPERA = bAgent.indexOf("Opera",0) != -1 ? 1 :0;
this.SAFARI = bAgent.indexOf("Safari",0) != -1 ? 1 :0;
this.checkObj = d.all?(d.getElementById?3:2):(d.getElementById?4:(d.layers?1:0));
this.allObj = ((this.checkObj == 1) || (this.checkObj == 2) || (this.checkObj == 3) || (this.checkObj == 4));
return this;
}
var usr = new sniffer;