Enables the style sheets matching the specified name in the current style sheet set, and disables all other style sheets (except those without a title, which are always enabled).
The Document.readyState property of a document describes the loading state of the document.
The <keygen> elements expose the HTMLKeygenElement interface, which provides special properties and methods (beyond the regular element object interface they also have available to them by inheritance) for manipulating the layout and presentation of keygen elements.
The command element represents a command which the user can invoke.
Returns the height of the document object. In most cases, this is equal to the <body> element of the current document.
The HTMLElement.style property returns a CSSStyleDeclaration object that represents only the element's inline style attribute, ignoring any applied style rules.  See the CSS Properties Reference for a list of the CSS properties accessible via style.
The HTMLInputElement.multiple property indicates if an input can have more than one value. Firefox currently only supports multiple for <input type="file">.