zur Beschreibung
document.compatMode im Standards Mode
Dokumenttyp-Deklaration
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
Darstellungsmodus
JavaScript-Alert-Box
javascript:alert(document.compatMode);