browsername=navigator.appName;

if (browsername.indexOf("Netscape")!=-1) {browsername="NS"}

else

{if (browsername.indexOf("Microsoft")!=-1) {browsername="MSIE"}

else {browsername="N/A"}};



//detect the browserversion

browserversion="0";

if (navigator.appVersion.indexOf("2.")!=-1) {browserversion="2"};

if (navigator.appVersion.indexOf("3.")!=-1) {browserversion="3"};

if (navigator.appVersion.indexOf("4.")!=-1) {browserversion="4"};

if (navigator.appVersion.indexOf("5.")!=-1) {browserversion="5"};

if (navigator.appVersion.indexOf("6.")!=-1) {browserversion="6"};



// Select Relevent CSS File

if (browsername=="NS") {

   document.write ("<link href='nnstyles.css' rel='stylesheet' type='text/css' />"); }



if (browsername=="MSIE"){

  if (browserversion<4){

   document.write ("<link href='iestyles.css' rel='stylesheet' type='text/css' />"); }



  else {

   document.write ("<link href='iestyles.css' rel='stylesheet' type='text/css' />"); }

}

if (browsername=="N/A") {

   document.write ("<link href='iestyles.css' rel='stylesheet' type='text/css' />"); };