// JavaScript Document
function Browser(){
  var ua,s,i
  ua = navigator.userAgent
  this.isIE=false; this.isMacIE=false; this.isGecko=false; this.isSafari=false; this.version=null;
  s="MSIE"
  if ((i=ua.indexOf("MSIE"))>=0){
    this.isIE=true
	if ((i=ua.indexOf("MSIE"))>=0 && (ua.indexOf("Mac"))>=0)
		this.isMacIE=true
    this.version=parseFloat(ua.substr(i+s.length))
    return
  }
  s="Gecko/"
  if ((i=ua.indexOf(s))>=0){
    this.isGecko=true
    this.version=parseInt(ua.substr(i+s.length))
    return
  }
  s="Safari/"
  if ((i=ua.indexOf(s))>=0){
    this.isSafari=true
    this.version=parseFloat(ua.substr(i+s.length))
    return
  }
  s="Opera/"
  if ((i=ua.indexOf(s))>=0){
    this.isOpera=true
    this.version=parseFloat(ua.substr(i+s.length))
    return
  }
}
var browser=new Browser()