function Browser()
{
  var agt=navigator.userAgent.toLowerCase()
  this.agt=agt;
  this.mjr=parseInt(navigator.appVersion)
  this.mnr=parseFloat(navigator.appVersion)
  this.nav=((agt.indexOf('mozilla')!=-1) && ((agt.indexOf('spoofer')==-1) && (agt.indexOf('compatible')==-1)))
  this.nav2=(this.nav && (this.mjr==2))
  this.nav3=(this.nav && (this.mjr==3))
  this.nav4=(this.nav && (this.mjr==4))
  this.nav4up=this.nav && (this.mjr>=4)
  this.mozilla=this.nav&&(this.mjr>=5)&&(agt.indexOf('gecko')!=-1);
  this.navonly   =(this.nav && (agt.indexOf(";nav")!=-1))
  this.ie=(agt.indexOf("msie") != -1)
  this.ie3=(this.ie && (this.mjr==2))
  this.ie4=(this.ie && (this.mjr==4))
  this.ie4up=this.ie && (this.mjr>=4)
  this.opera=(agt.indexOf("opera")!=-1)
  if (this.nav2 || this.ie3) this.js=1.0; else
   if (this.nav3 || this.opera) this.js=1.1; else
    if (this.nav4 || this.ie4) this.js=1.2; else
     if ((this.nav && (this.mnr > 4.05)) || (this.ie && (this.mjr>4))) this.js=1.2; else this.js=0.0
}

var is=new Browser;