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HTML contains

you want to track where users are coming from (perhaps to see if someone visited your site via Google

or another search engine). But again, this can also be handled server-side.

The

title

property is read/write, so you can change the title of your page at any time regardless of

what the HTML contains. This is particularly useful when a site uses a frameset and only one frame is

changing while the overall frameset remains unchanged. Using this property, you can change the title

(which is displayed in the overall browser title bar) to reflect the new page loaded into the frame:

top.document.title = “New page title”;

The

URL

property is also read/write, so you can use it to retrieve the URL of the current page, or you can

set it to a new URL, which causes the window to navigate there. For example:

document.URL = “http://www.wrox.com/”;

As mentioned previously, the

document

object also has a number of collections providing access to vari-

ous parts of the loaded page. These collections are outlined in the following table:

Collection

Description

anchors

Collection of all anchors in the page (represented by

name=”anchorname”></a>

)

applets

Collection of all applets in the page

embeds

Collection of all embedded objects in the page (represented by the

tag)

forms

Collection of all forms in the page

images

Collection of all images in the page

links

Collection of all links in the page (represented by

<a href=

”somewhere.htm”></a>)

Similar to the

window.frames

collection, each of the

document

collections is indexed both by number

and by name, meaning that you can access an image by

document.images[0]

document.images

[“image_name”]

. Consider the following HTML page:

<html>

<head>

<title>Document Example</title>

</head>

<body>

<p>Welcome to my <a href=”home.htm”>home</a> away from home.</p>

</form>

</body>

</html>

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