var
	    fehler ="Optimal bir g\366r\374nt\374 i\347in\r\nEkran \307\366z\374n\374rl\374g\374 enaz 1024x768\r\nveya daha fazlasi olmali";
	
	if(navigator.appName ==  "Netscape")
	{
		<!-- Ermittlung der Auflösung mit Java
		var screen_width = null;
		var screen_height = null;
		var resolution = null;
 
		if ((java) && (navigator.javaEnabled())) 
		{
			var toolkit = java.awt.Toolkit.getDefaultToolkit();
			var screen_size = toolkit.getScreenSize();
			screen_width = screen_size.width;
			screen_height = screen_size.height;
			resolution = toolkit.getScreenResolution();
		}   //-->
		if (screen_width <= 800)
			alert(fehler)
	}
	else
	{
		if (self.screen.width <= 800 || self.screen.height <= 600) 
    			alert(fehler)
  	}