if (screen.width == 640) {
document.write('<link rel="stylesheet" href="./sharp800style.css">');
}
if ((screen.width >= 720) && (screen.width <=920)) {
document.write('<link rel="stylesheet" href="./sharp800style.css">');
}
if ((screen.width >= 921) && (screen.width <=1150)) {
document.write('<link rel="stylesheet" href="./sharp1024style.css">');
}
if ((screen.width >= 1151) && (screen.width <=1450)) {
document.write('<link rel="stylesheet" href="./sharp1154style.css">');
}