var xy = navigator.appVersion;
xz = xy.substring(0,4);

document.write("Browser: ");
document.write(navigator.appName, "<br />");
document.write("Version: ");
document.write(navigator.appVersion, "<br />");
document.write ("Code Name: ");
document.write(navigator.appCodeName, "<br />");
document.write("Platform: ");
document.write(navigator.platform, "<br />");
document.write("JavaScript enabled: "); 
if (navigator.javaEnabled()) document.write("Enabled", "<br />");
else document.write("Disabled (JavaScript required)", "<br />")
document.write("Color Depth: "); 
document.write(window.screen.colorDepth, "<br />");
document.write("Screen Resolution: ");
document.write(window.screen.width," x ",window.screen.height, "<br />");