Browser JavaScript Information

When writing HTML/JavaScript code, one often has to deal with browser specific issues. This page displays information according to the JavaScript interpreter used by your browser.

If you are looking for a programmer's reference to the JavaScript language, try the following links:

Firefox will allow one to pull up a JavaScript console (Error Console) by pointing the browser at the special '' URL.

NST JavaScript Console

When coding HTML/JavaScript, it is often desirable to have a JavaScript Console embedded within the web page as an aid for code debug and development.

Embedded NST JavaScript Console

Having a console within the web page under development makes it easier to peak at and debug JavaScript code associated with the page.
Embedding the console within a web page allows one to use the same tool independently of the browser being used for testing (The "NST JavaScript Console" will work for both the IE and the Firefox Web browser).

The NST authors have developed the "NST JavaScript Console" for this purpose.

JavaScript Constants And Static Functions

JavaScript	Results
document.alinkColor
document.anchors
document.applets
document.bgColor
document.cookie
document.domain
document.embeds
document.fgColor
document.forms
document.images
document.lastModified
document.linkColor
document.links
document.location
document.location.hash
document.location.host
document.location.hostname
document.location.href
document.location.pathname
document.location.port
document.location.protocol
document.location.search
document.plugins
document.referer
document.title
document.URL
document.vlinkColor
Math.PI
navigator.mimeTypes.length
navigator.appCodeName
navigator.appName
navigator.appVersion
navigator.javaEnabled()
navigator.language
navigator.platform
navigator.plugins.length
navigator.systemLanguage
navigator.userAgent
navigator.userLanguage
Number.MAX_VALUE
Number.MIN_VALUE
Number.NaN
Number.NEGATIVE_INFINITY
Number.POSITIVE_INFINITY
RegExp.input
RegExp.lastMatch
RegExp.lastParen
RegExp.leftContext
RegExp.multiline
RegExp.rightContext
screen.availHeight
screen.availLeft
screen.availTop
screen.availWidth
screen.colorDepth
screen.height
screen.pixelDepth
screen.width
window.closed
window.defaultStatus
window.document
window.frames
window.history
window.length
window.location
window.Math
window.name
window.navigator
window.offscreenBuffering
window.opener
window.parent
window.screen
window.self
window.status
window.top
window.window

Note:

If you see undefined in the results above, it indicates that your browser does not include support for the JavaScript code.

JavaScript Date

The JavaScript Date class has MANY different methods which can be used. The following shows what results will be returned by these methods. The first line in the table assigns your current system time to the variable now which is then referenced by the remaining rows in the table:

JavaScript	Results
now = new Date()
now.getDate()
now.getDay()
now.getFullYear()
now.getHours()
now.getMilliseconds()
now.getMinutes()
now.getMonth()
now.getSeconds()
now.getTime()
now.getTimezoneOffset()
now.getUTCDate()
now.getUTCDay()
now.getUTCFullYear()
now.getUTCHours()
now.getUTCMilliseconds()
now.getUTCMinutes()
now.getUTCMonth()
now.getUTCSeconds()
now.getYear()
now.toDateString()
now.toGMTString()
now.toLocaleDateString()
now.toLocaleString()
now.toLocaleTimeString()
now.toString()
now.toUTCString()
now.toTimeString()
now.valueOf()

JavaScript MIME Types

Some (like Firefox) browsers permit JavaScript to view what plugins are installed. If a browser supports the about: URL handler, it may also report information about the plugins when one specifies the about:plugins URL. Unfortunately, there are security issues which prevent us from giving you links to the "about:", "about:plugins" and "about:config" URLs, so you'll have to type them in by hand if you want to try them out.