var browser = (navigator.userAgent); 

if (self.screen) {
        width = screen.width
        height = screen.height
}
else if (self.java) {
       var jkit = java.awt.Toolkit.getDefaultToolkit();
       var scrsize = jkit.getScreenSize();       
       width = scrsize.width; 
       height = scrsize.height; 
}
else{
 width = height = '0'
}
location.href="initialisieren.php?width="+width+"&height="+height, "_self";