The HTMLElement interface represents any HTML element. Some elements directly implement this interface, others implement it via an interface that inherits it.
The HTMLFormElement.acceptCharset property represents a list of the supported character encodings for the given FORM element. This list can be comma- or space-separated.
The HTMLFormElement.elements property returns an HTMLFormControlsCollection (HTML 4HTMLCollection) of all the form controls contained in the FORM element, with the exception of input elements which have a type attribute of image.
Returns version information about the document type definition (DTD) of a document. While this property is recognized by Mozilla, the return value for this property is always an empty string.
The contentWindow property returns the Window object of an <iframe> element. You can use this Window object to access the iframe's document and its internal DOM. This attribute is read-only, but its properties can be manipulated like the global Window object.