There have been one or two of these. This one goes a step further than most.
Dividing up text
Use <p> at the end of a line to create a new paragraph
Use <br> at the end of a line to start a new line
Use <hr> to place a line across the page e.g.
Emphasising Text
Use <b> and </b> either side of your text to make it
boldUse <i> and </i> either side of your text to make it
italicUse <strike> and </strike> either side of your text to
strike it out Use <u> and </u> either side of your text to
underline itUse <em> and </em> either side of your text to
emphasise itUse <sup> and </sup> either side of your text to make it
superscriptUse <sub> and </sub> either side of your text to make it
subscriptUse <code> and </code> either side of your text to
change the font Use between text to force a space
Quoting
Creating your own block quote
Use <blockquote> and </blockquote> either side of your text eg
Here's my quote...i don't know what to say but I'll have tothink of something to be able to demonstrate what the block quote tags can do. Effectively they place space to the left and right of the inserted text.
Lists
Ordered and unordered lists do not seem to work. Pity.
Linking
To link to another page you will need the URL of that page. This is available from the address box of your browser. Once you have this address use the following to put the link in your post
<a href="Your URL here, keeping the quotes">The text to display here</a>
For example, if you put the following in your post
<a href="http://whathifi.co.uk/forums/">This links to the forums</a>
The following will be displayed, allowing the user to follow the link to the forums page
This links to the forums
Emoticons
Use the following to place in an emoticon image.
<img src="URL to image"/>
| Emoticon Type | URL | Image |
|---|
| Smile | http://whathifi.com/emoticons/emotion-1.gif |  |
| Grin | http://whathifi.com/emoticons/emotion-2.gif |  |
| Surprised? | http://whathifi.com/emoticons/emotion-3.gif |  |
| Eager? | http://whathifi.com/emoticons/emotion-4.gif |  |
| Wink | http://whathifi.com/emoticons/emotion-5.gif |  |
| Sad | http://whathifi.com/emoticons/emotion-6.gif |  |
| Verge of crying? | http://whathifi.com/emoticons/emotion-7.gif |  |
| Bemused? | http://whathifi.com/emoticons/emotion-8.gif |  |
| In a sweat | http://whathifi.com/emoticons/emotion-9.gif |  |
| Embarassed | http://whathifi.com/emoticons/emotion-10.gif |  |
So placing this in your post
<img src="http://whathifi.com/emoticons/emotion-10.gif"/>
will display this in your post

Images
Use the following to place in an image in your post.
<img src="URL to image"/>
You can only post images which are available on line.
Find the image you want to display. Right click the image and select properties. Copy the URL and use it to define the src (source) of the image.
So placing this in your post
<img src="http://www.haymarket.com/images/brands/media/name/Stufftv_logo.gif"/>
will display this in your post

To post your own images, you'll have to host them in something like flickr. This is what I use but doubtless there are others.#
EDIT FROM MODS - When posting pictures, please format them to max 400 pixels wide to avoid them busting out of the forum frame. Huge pictures will be deleted.
Table
More complex. A two column table is defined like this
<table>
<tr><th>Column 1</th><th>Column 2</th></tr>
<tr><td>Row 1 Column 1</td><td>Row 1 Column</td></tr>
<tr><td>Row 2 Column 1</td><td>Row 2 Column </td></tr>
<tr><td>Row 3 Column 1</td><td>Row 3 Column </td></tr>
</table>
This html will display this
| Column 1 | Column 2 |
|---|
| Row 1 Column 1 | Row 1 Column 2 |
| Row 2 Column 1 | Row 2 Column 2 |
| Row 3 Column 1 | Row 3 Column 2 |
Simply copy the HTML above into your post and modify the text for your own. Unless you know what you are doing, I suggest that you do not add additional columns.
Change the background colour of a table using the bgcolor attribute
<table bgcolor="LightGrey">
<tr><th>Column 1</th><th>Column 2</th></tr>
<tr><td>Row 1 Column 1</td><td>Row 1 Column 2</td></tr>
<tr><td>Row 2 Column 1</td><td>Row 2 Column 2</td></tr>
<tr><td>Row 3 Column 1</td><td>Row 3 Column 2</td></tr>
</table>
This will give you
| Column 1 | Column 2 |
|---|
| Row 1 Column 1 | Row 1 Column 2 |
| Row 2 Column 1 | Row 2 Column 2 |
| Row 3 Column 1 | Row 3 Column 2 |