var b_version = "0"



var b_vernum = 0



var OS_version = "0"



var DOM_compliant = 0



var b_NS6 = 0

var b_NS4 = 0





if(navigator.appName == "Microsoft Internet Explorer")



  {



  b_version = navigator.appVersion.substring(navigator.appVersion.indexOf('MSIE') + 5, navigator.appVersion.length)



  b_version = b_version.substring(0, b_version.indexOf(';'))







  OS_version = navigator.appVersion.substring(navigator.appVersion.indexOf('Windows'), navigator.appVersion.length)



  if (OS_version.indexOf(';')>-1)



    {



    OS_version = OS_version.substring(0, OS_version.indexOf(';'))



    }



  else



    {



    OS_version = OS_version.substring(0, OS_version.indexOf(')'))



    }



  if (parseFloat(b_version) > 3.9)



    {DOM_compliant = 1}



  }











if(navigator.appName == "Netscape")



  {



  b_version = navigator.appVersion.substring(0, navigator.appVersion.indexOf(' '))


  


  if (parseFloat(b_version) >= 5) b_NS6 = 1

  else if  (parseFloat(b_version) >= 4) b_NS4 = 1



  OS_version = "Windows " + navigator.appVersion.substring(navigator.appVersion.indexOf('Win') + 3, navigator.appVersion.length)







  if (OS_version.indexOf(';')>-1)



    {



    OS_version = OS_version.substring(0, OS_version.indexOf(';'))



    }



  else



    {



    OS_version = OS_version.substring(0, OS_version.indexOf(')'))



    }



  if (parseFloat(b_version) > 4.9)



    {DOM_compliant = 1}



  }







b_vernum=parseFloat(b_version)