function setcss() {
if (screen.width >= 1400) {
document.write("<link rel=stylesheet type=text/css href=styles/css_1400_1050.css />");
}
if (screen.width == 1280) {
document.write("<link rel=stylesheet type=text/css href=styles/css_1280_1024.css />");
}
if (screen.width < 1280) {
document.write("<link rel=stylesheet type=text/css href=styles/css_1024_768.css />");
}
}