//document.write(screen.width);
if (screen.width < 801) {
    css = '<link href="/App_Themes/res/800-775-748.css" rel="stylesheet" type="text/css" />';
    //            document.write("33333" + screen.width);
}

if (screen.width > 960 && screen.width < 1025) {
    css = '<link href="/App_Themes/res/1024-960-940.css" rel="stylesheet" type="text/css" />';
    //            document.write("33333" + screen.width);
}

if (screen.width > 1024 && screen.width < 1270) {
    css = '<link href="/App_Themes/res/1152-1100-1068.css" rel="stylesheet" type="text/css" />';
   //            document.write("222222" + screen.width);
}

if (screen.width > 1270) {
    css = '<link href="/App_Themes/res/1280-1200-1180.css" rel="stylesheet" type="text/css" />';
    //    document.write("11111111" + screen.width);

}

document.write(css);