var browser=navigator.appName
  var b_version=navigator.appVersion
  var version=parseFloat(b_version)
	
  if (browser=="Microsoft Internet Explorer")
   { 
   document.write('<link rel="stylesheet" href="iecss.css">') 
   }
  else if (browser=="Netscape")
   { 
   document.write('<link rel="stylesheet" href="netscapecss.css">')
   }
   
  else 
   { 
   document.write('<link rel="stylesheet" href="operacss.css">')
   }