Find Screen Resolution Using Javascript

You Can find screen Resolution in javascript using following code:

var screenW = 640, screenH = 480;
if (parseInt(navigator.appVersion) > 3) {
    screenW = screen.width;
    screenH = screen.height;
}
else if (navigator.appName == "Netscape"
    && parseInt(navigator.appVersion) == 3
    && navigator.javaEnabled()
   ) {
    var jToolkit = java.awt.Toolkit.getDefaultToolkit();
    var jScreenSize = jToolkit.getScreenSize();
    screenW = jScreenSize.width;
    screenH = jScreenSize.height;
}

document.write("screenW " + screenW );

document.write("screenH " + screenH );