function setScreen(){
        return;
        var height=0;
        var width=0;
        if (self.screen) {
                width = screen.width
                height = screen.height
        }
        else if (self.java) {   // for NN3 with enabled Java
                var jkit = java.awt.Toolkit.getDefaultToolkit();
                var scrsize = jkit.getScreenSize();
                width = scrsize.width;
                height = scrsize.height;
        }
        var left_pos = Math.round((width-1000)/2);
        div_main = document.getElementById("container");
        div_main.style.left = left_pos+"px";
        div_main.style.display="block";
}