if (screen.height <= 768) {
document.write('<link rel="stylesheet" href="/stylesheet-768.css">');
}

if ((screen.height > 768 && screen.height <= 800)) {
document.write('<link rel="stylesheet" href="/stylesheet-800.css">');
}

if ((screen.height > 800 && screen.height <= 900)) {
document.write('<link rel="stylesheet" href="/stylesheet-900.css">');
}

if ((screen.height > 900 && screen.height <= 1000)) {
document.write('<link rel="stylesheet" href="/stylesheet-1000.css">');
}

if ((screen.height > 1000 && screen.height <= 1100)) {
document.write('<link rel="stylesheet" href="/stylesheet-1100.css">');
}

if ((screen.height > 1100 && screen.height <= 1200)) {
document.write('<link rel="stylesheet" href="/stylesheet-1200.css">');
}

if (screen.height > 1200) {
document.write('<link rel="stylesheet" href="/stylesheet-max.css">');
}