LaTeX.org

Can any one tell me the tag to produce the output like
@page {
@top-left {
content: string(guideword, first);
}
@top-center {
content: counter(page);
}
@top-right {
content: string(guideword, last);
}
}
@page :first {
@top-left { content: ''; }
@top-center { content: ''; }
@top-right ...