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Here is a Firefox addon (&quot;Alertbox&quot;) to do that: &nbsp;<a href="https://addons.mozilla.org/en-us/firefox/addon/alertbox/" rel="ugc nofollow">https://addons.mozilla.org/en-us/firefox/addon/alertbox/</a>
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Here is a Firefox addon ("Alertbox") to do that:  https://addons.mozilla.org/en-us/firefox/addon/alertbox/ [https://addons.mozilla.org/en-us/firefox/addon/alertbox/]

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There is a web page that I'd like to receive an email alert on when it changes. <br />
How can this be done?<br />
Example: &nbsp; <br />
<a href="http://losangeles.ucbtrainingcenter.com/courses/view/11129" rel="ugc">http://losangeles.ucbtrainingcenter.com/courses/view/11129</a><br />
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This course is currently sold out. &nbsp;When the page changes, I'd like to be alerted. &nbsp;Sometimes people drop out of courses before they start.
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There is a web page that I'd like to receive an email alert on when it changes. 
How can this be done?
Example:   
http://losangeles.ucbtrainingcenter.com/courses/view/11129

This course is currently sold out.  When the page changes, I'd like to be alerted.  Sometimes people drop out of courses before they start.

I need to be alerted when a particular web page changes.

Web development can range from developing the simplest static single page of plain text to the most complex web-based internet applications, electronic businesses, and social network services using a wide variety of languages and standards, including the familiar HTML, JavaScript and jQuery, ASP and ASP.NET, PHP, ColdFusion, CSS, PHP, Flex and Flash, but also the implementation of a broad list of standards including XML, WSDL, SSDL, VoiceXML and many more.

Web Languages and Standards

A web server refers to the software that helps to deliver web content that can be accessed either through the Internet or through an intranet. The primary function of a web server is to store, process and deliver web pages to clients. The communication between client and server takes place using the Hypertext Transfer Protocol (HTTP). The most common use of web servers is to host websites, but there are other uses such as gaming, data storage, running enterprise applications, handling email, FTP, etc.

Web Servers

Web browsers are applications used primarily to display documents, files and media from the Internet, identified by a Uniform Resource Identifier (URI) that can be a page, image, video or other file. Some browsers require the use of add-ons or extensions to safely render the information they receive; others have systems built into them to perform the same functions.