DOM Document Object properties & DOM Element properties

Document Object properties:

body
body.offsetWidth, body.offsetHeight
compatMode
document.documentMode IE8 only property
doctype
documentElement
domain
implementation
ownerDocument
readyState IE property. Supported in Opera 9+, Chrome, and FF 3.6+ as well.
styleSheets[]
title
URL
more info see: DOM Document Object properties

DOM Element properties attributes[]
childNodes[]
className
clientWidth (A cross browser (NS7+, IE4+) property that returns the viewable width of the content on the page, not including borders, margins, or scrollbars (overflowing content).)
clientHeight
dir (Read/write property that returns the text direction of the element. Valid values are "ltr" (left to right) and "rtl" (right to left). Default is "ltr.")
firstChild
id
innerHTML
lang
lastChild
localName
namespaceURI
nextSibling
nodeName
nodeType
nodeValue
offsetLeft
offsetTop
offsetParent
offsetWidth (A cross browser (non W3C DOM) property that returns the width of the element, including borders and padding if any, but not margins. In IE6, if a valid doctype is not specified, margins/padding are NOT included in the returned value.)
offsetHeight
ownerDocument
parentNode
prefix
previousSibling
scrollLeft (A cross browser (NS7+, IE4+) property that returns the distance between the actual left edge of the element and its left edge currently in view. In a horizontally scrollable DIV for example, as you drag the scrollbar to the right, the DIV's scrollLeft property increases as the distance between its actual left edge and visible left edge increases. Applicable to scrollable elements, such as a DIV with scrollbars, a textarea, the BODY etc.)
scrollTop
scrollHeight (A cross browser (NS7+, IE4+) property that returns the entire height of an element, including any area that may be hidden due to scrollbars. When the element does not contain vertical scrollbars, its scrollHeight is equal to its clientHeight.)
scrollWidth
style
tabIndex
tagName
title
more info see: http://www.javascriptkit.com/domref/elementproperties.shtml

BTW: <script language="type/javascript"> The part in red is purely optional, as the browser by default assumes a <script> tag to be JavaScript, though you should include it nevertheless for validation reasons.