var Win=(navigator.userAgent.indexOf("Win")!=-1);
var Mac=(navigator.userAgent.indexOf("Mac")!=-1);
var Explorer=(navigator.appName.indexOf("Explorer")!=-1);
var Netscape=(navigator.appName.indexOf("Netscape")!=-1);
var opera=(navigator.userAgent.indexOf("Opera")!=-1);
var safari=(navigator.userAgent.indexOf("Safari")!=-1);

if (Explorer) {
    if (navigator.userAgent.indexOf ("MSIE 3") != -1) { var Version = "3"; }
    else if (navigator.userAgent.indexOf ("MSIE 4") != -1) { var Version = "4"; }
    else if (navigator.userAgent.indexOf ("MSIE 5") != -1) { var Version = "5"; }
    else { var Version = "6"; }
} else {
    var Version=navigator.appVersion.charAt(0);}


if
(opera)
{document.write('<LINK rel="stylesheet" href="../css/pixel.css" type="text/css">');}
else if
(safari)
{document.write('<LINK rel="stylesheet" href="../css/pixel.css" type="text/css">');}
else if
(Win && Explorer && Version=="6")
{document.write('<LINK rel="stylesheet" href="../css/win_ie6.css" type="text/css">');}
else if
(Win && Netscape && Version=="4")
{document.write('<LINK rel="stylesheet" href="../css/win_nn4.css" type="text/css">');}
else if
(Explorer && Mac && Version=="5") 
{document.write('<LINK rel="stylesheet" href="../css/keyword.css" type="text/css">');}
else if
(Mac && Netscape && Version=="5")
{document.write('<LINK rel="stylesheet" href="../css/mac_nn6.css" type="text/css">');}
else if
(Mac && Netscape && Version=="4")
{document.write('<LINK rel="stylesheet" href="../css/mac_nn4.css" type="text/css">');}
else
{document.write('<LINK rel="stylesheet" href="../css/pixel.css" type="text/css">');}