Using keypresses as an alternate way to to navigate through websites  is a great way to make sites more accessible. For instance pressing 'p' takes the user to the previous page, while pressing 'n' takes them to the next. The benefits of using jQuery to achieve this are:

1. Concise code
2. Easy to implement various functions on keypress
3. Works on IE, Firefox & Safari

DETECTING THE KEY CODE

To detect which key a user has pressed you need to set up a function that returns an ascii code each time a key is pressed. A full table of ascii codes is available here. The tricky part to this is that Mozilla and Safari define the value as charCode, while IE defines  it as keyCode. The following script is based on the 'n' key and 'p' key, it takes the links from the 'Previous' and 'Next' buttons on your site and changes page when the key is pressed. Also note that it is important to detect for both the lower-case and upper-case letter as the ascii codes will be different for each.

SOURCE

//process this function whenever a key is pressed
$(document).keypress(function (e) {
//Next
//if the keyCode or charCode is 110 (lower case n) or 78 (upper case N)
if (e.keyCode == 110 || e.charCode == 110 || e.keyCode == 78 || e.charCode == 78){
//grab the href attribute from the link with the id "next_link"
var next_link = $("a#next_link").attr("href");
//if the next link exists (i.e if it's not the last page)
if(next_link){
//go to the next page
window.location = next_link;
}
}
//Previous
//works exactly as the above example but for the 'p' and 'P' keys
if (e.keyCode == 112 || e.charCode == 112 || e.keyCode == 80 || e.charCode == 80){
var prev_link = $("a#prev_link").attr("href");
if(prev_link){
window.location = prev_link;
}
}

});

You must have the jQuery library installed on your site to run this script. For more info about jquery visit the site: http://jquery.com/

I was recently confronted with the problem of having a single html form with three different submit buttons, each button submitting the form data to a different php script. This is obviously impossible with html alone, as a form can only have one 'action' attribute, which dictates the URL of the file that the form's data is submitted to.

I searched around on the web for an easy way to implement this and found various examples. One of the best examples I found was on CoderLab's blog: Multiple submit buttons on a multiple blog which uses javascript to apply a different action attribute to the form depending on which button is pressed. Each button in the form has it's own onClick function like so:

<form name="myForm" id="myForm">
Search: <input type="text" id="wrdSearch"/>
<input type="button" name="google" id="google" value="Google" onClick="SendTo(this.id)"/>
<input type="button" name="msn" id="msn" value="MSN" onClick="SendTo(this.id)"/>
<input type="button" name="yahoo" id="yahoo" value="Yahoo" onClick="SendTo(this.id)"/>
</form>

(Visit the page to see the javascript that goes with it: http://blog.coderlab.us/2005/10/04/multiple-submit-buttons-in-a-form/)

As I already had jQuery installed on the site, and the CoderLab script would still need some modification to serve my specific purpose, I decided to see if I could find a simpler way to achieve a similar result using jQuery. The form on my site was a lot more complex, with many fields etc. So what I really needed was a script that would submit all the form data to each of the 3 php scripts depending on which submit button was clicked.

Firstly, I stripped the onClick functions out of the form and removed the name attributes from the buttons too, like so:

<form id="myForm" method="post">
Search: <input type="text" name="search"/>
<input type="button" id="button1" value="Submit to script 1" />
<input type="button" id="button2" value="Submit to script 2" />
<input type="button" id="button3" value="Submit to script 3" />
</form>

I then wrote the following jQuery script to change the form's action attribute accordingly and submit it when each button is pressed:

$(document).ready(function(){

$("#button1").click(function(){
$('form#myForm').attr({action: "script_1.php"});
$('form#myForm').submit();
});

$("#button2").click(function(){
$('form#myForm').attr({action: "script_2.php"});
$('form#myForm').submit();
});

$("#button3").click(function(){
$('form#myForm').attr({action: "script_3.php"});
$('form#myForm').submit();
});

});

The script should work on any browser that is compatible with jQuery (see here: http://docs.jquery.com/Browser_Compatibility)

For more information on installing and using jQuery visit the website: http://jquery.com/

The WP Background Tile Plugin for WordPress applies a tiled background image to your blog.  It is as simple as this:

• Create a background image
• Upload it
• Apply it as the background via the WP Background Tile options page

Applying a repeat pattern to the background of a webpage is easily done using css:

body {background-image: url(example.jpg);}

However, if you're not into writing code, or don't know where to insert the css into your wordpress theme, then you will find this plugin much easier. It can also be an easy way of testing out lots of background images before deciding on one you are happy with.

INSTALLATION:

1. Download the plugin from the link at the bottom of this page
2. Upload the wp-background-tile folder to your wp-content/plugins folder.
3. Activate the plugin from the Plugins page in WordPress.

USAGE:

1. Upload your background image via 'Media => Add New' in Wordpress (or via FTP)
2. Go to 'Settings => WP Background Tile' in WordPress
3. Paste or type in the URL of your background image (explained in more detail below)
4. Press 'Submit'

CREATING A BACKGROUND TILE:

A background tile is an image which is repeated in both directions over the background of a webpage. Look closely at the background of my site and you will notice the green background is not a matte colour, but a subtle texture. Right click on the background of my site and choose 'View Background Image' (Firefox) or 'Save Background As' (IE) and have a look at the image. You will notice that it is small (16 x 16 pixels), as you don't need much of the pattern to make it tile. Stripes and other geometric patterns can work well for a subtle effect.

Tip: Check out the free online Stripe Generator tool, it's a really easy way to create striped background tiles.

Background tiles can also be used for larger images such as a logo repeat. An example of this is www.mrdupes.com. To achieve this type of result using photoshop the 'offset' filter can be very useful.

GETTING THE URL OF A FILE YOU HAVE UPLOADED WITH WORDPRESS:

1. Go to 'Posts => Add New'
2. Click on the 'Add Media' button (a little star type icon next to 'Upload/Insert')
3. Click on the 'Media Library' tab
4. Click on the word 'Show' next to the file you want the url for
5. Under 'Link URL' click on the button 'File URL'
6. The file url should now be in the 'Link URL' text box so you can copy it.

DOWNLOAD PLUGIN:

This article is an extension / improvement upon another article I published on my site previously: {{post id="simple-javascript-for-image-mouseovers" text="Simple Javascript for Image Mouseovers"}}. As I am always looking for improved methods, I was discussing the pitfalls of the javascript method with a friend (and occasional comment writer / contributor to my site) who pointed me in the direction of CSS and image sprites. This lead me to research the topic further, and I found two articles in particular which were incredibly useful:

Read on…

This WordPress plugin changes the default email address that all notifications sent from your blog are addressed from. The default address for all emails sent by your blog is currently wordpress@ yoursite.com.

I had seen some tutorials / forum entries previously where people suggested editing the core WordPress file 'pluggable.php' to overide this default. This method does work, however you would have to repeat the hack every time you upgrade to a new version of WordPress so it is not an ideal solution.

Faced with this problem for a site I was working on recently, I wrote this basic plugin which allows you to configure your own email address in the format: Your Name <yourname@yoursite.com>.

Installation:

1. Upload the file wp_change_default_email.php to your wp-content/plugins folder
2. Activate the plugin from the Plugins page in WordPress

Usage:

1. In the Plugins page in WordPress click the edit button next to the plugin in the list.
2. Scroll down until you see a note saying 'Configure it'
3. Enter your name and email as shown
4. If you don't enter a new address the default 'wordpress@' will remain

Download: