function Navigator()
{
	this.isIE = navigator.appVersion.indexOf('MSIE') != -1 ? true : false;
	this.ieVer = this.isIE ? navigator.appVersion.substr(navigator.appVersion.indexOf('MSIE')+5, 3) : -1;
	this.nsVer = !this.isIE ? parseInt(navigator.appVersion.substr(0, 3)) : -1;
}
var __nav = new Navigator();