var nVer = navigator.appVersion;
var nAgt = navigator.userAgent;
var browserName  = navigator.appName;
var fullVersion  = ''+parseFloat(navigator.appVersion); 
var majorVersion = parseInt(navigator.appVersion,10);
var nameOffset,verOffset,ix;

// In Opera, the true version is after "Opera" or after "Version"
if ((verOffset=nAgt.indexOf("Opera"))!=-1)
document.writeln("<link rel=\"stylesheet\" type=\"text/css\" href=\"\/css/\style_opera.css\" title=\"opera\">")
// In MSIE, the true version is after "MSIE" in userAgent
else if ((verOffset=nAgt.indexOf("MSIE"))!=-1) 
document.writeln("<link rel=\"stylesheet\" type=\"text/css\" href=\"\/css/\style_default.css\" title=\"ie\">")
// In Chrome, the true version is after "Chrome" 
else if ((verOffset=nAgt.indexOf("Chrome"))!=-1) 
document.writeln("<link rel=\"stylesheet\" type=\"text/css\" href=\"\/css/\style_chrome.css\" title=\"chrome\">")
// In Safari, the true version is after "Safari" or after "Version" 
else if ((verOffset=nAgt.indexOf("Safari"))!=-1) 
document.writeln("<link rel=\"stylesheet\" type=\"text/css\" href=\"\/css/\style_default.css\" title=\"safari\">")
// In Firefox, the true version is after "Firefox" 
else if ((verOffset=nAgt.indexOf("Firefox"))!=-1) 
document.writeln("<link rel=\"stylesheet\" type=\"text/css\" href=\"\/css/\style_firefox.css\" title=\"firefox\">")
else
document.writeln("<link rel=\"stylesheet\" type=\"text/css\" href=\"\/css/\style_default.css\" title=\"default\">")