var screenwidth = screen.width;
if (screenwidth <= 1024) document.write('<link rel="stylesheet" href="/css/screen1024.css" type="text/css" media="screen" />');
else if ((screenwidth > 1024) && (screenwidth <= 1440)) document.write('<link rel="stylesheet" href="/css/screen1440.css" type="text/css" media="screen" />');
else if (screenwidth > 1440) document.write('<link rel="stylesheet" href="/css/screen1920.css" type="text/css" media="screen" />');