Thursday, June 26, 2008

The Dreaded '404' (Not Found) Error

An error 404 is the most frustrating thing you will come across in your Web surfing. It is sometimes just called "Not Found". A 404 error happens when you request a page that doesn't exist. This could happen for a number of reasons:
  • When you copied the address into your Web browser you made a mistake.
  • The address you copied had a mistake in it.
  • There was a mistake in the address of the link that you clicked.
  • There used to be a page at that address but it's no longer there because it was removed, or moved to somewhere else.
With a little investigative work you can usually beat the 404 blues.
Did you copy the address from somewhere on your computer like an email message? Using copy and paste you can avoid the middle-man and get the address straight from one place to another without even having to pass it through your own brain.
  • Select the address with your mouse using click and drag.
  • Press Ctrl-C (PC) or Apple-C (Mac).
  • Open up your Web Browser.
  • Click in the 'location bar' of your browser. This is the box, near the top of the browser, that contains the address of the page.
  • Delete the current contents of the location bar by pressing the 'delete' or 'backspace' key.
  • Press Ctrl-V (PC) or Apple-V (Mac). The new address should appear in the location bar.
  • Press the 'Enter' key.

Using a Web Browser

There are several different Web Browsers available. However, 90% of the Internet population uses one of the two most popular browsers - Netscape Navigator or Microsoft Internet Explorer. These two browsers are in fierce competition (in what's commonly called the "browser wars"). However their functionality is very similar - in fact all browsers share many of the same features.


Elements of your Browser

Hyperlinks: The most basic navigational element in a Web browser is a link. A link is a piece of text that takes you to another Web page (or somewhere else within the current Web page) when you click on it. Links are usually differentiated from the surrounding text by being a different colour and underlined.


Links that you have visited before will usually have a different colour to those that you have not been to yet.


You can define the default appearance of links in your browser's "preferences". Some pages will keep this default appearance, but others may define their own link colours.

Links may also be in the form of images. There is no clear way to tell whether an image is a link (sometimes there is a blue border around the picture). Most good Web sites will make their picture look like they should be clicked.


When you move your cursor over a link, the cursor shape will usually change into a hand. The destination of the link will also turn up in the status bar - the bar at the bottom of the browser.

Run your cursor over this link and you will see the cursor change to a hand and the status bar will show the address.


Location/Address Box: Another way to get to a Web page is to type its URL straight into the location box/address box.


To do this you have to know the URL. You can get them from external sources (eg advertisements, articles in magazines, books) - or you can copy and paste them from places on your computer (eg email messages). If you type a link into your Web browser you have to make sure you type it in exactly as it is written. One small mistake (like using the wrong case) and the browser will not be able to find the page that you want. Once you have typed (or pasted) the URL, you need to press the "Enter" key to signal to your browser to load the page.

Back Button: The back button is an important navigational tool. It takes you back to the last page you had open.


Go Menu: The Go menu is like the back button, but it has a list of all the pages you have visited. You can use this to get back to a page you have previously visited. It saves you having to repeatedly press the back button. In Netscape, use the "Go" menu on the menu bar. In Internet Explorer the menu is on the down arrow next to the Back button.


Bookmarks/Favorites: A bookmark is a place holder of a Web page - so you can easily find the page again when you want it. To define a bookmark in Netscape, select "Add Bookmark" from the "Bookmarks" menu. In Internet Explorer bookmarks are called "Favorites" - select "Add to Favorites" from the "Favorites" menu. When you want to go back to a page you have bookmarked, just select the name of the page from the Bookmarks/Favorites menu. After a while you will find that your bookmarks are overflowing, and it will get difficult to find what you want. When this happens you know that it's time to start filing your bookmarks into folders. You can do this by choosing 'Go to bookmarks' from the Bookmarks menu (or "Organize Favorites" from the "Favorites" menu). This will take you into a window where you can add folders, and then file your bookmarks by dragging them to the folder where you want them to live.


Images: Images are what make Web pages look attractive, but they are also what makes some Web pages take a long time to load. If you are on a slow connection you might not want to waste your time by downloading lots of images. You can avoid this by turning the images off, so they are no longer loaded automatically. You need to turn off "Auto Load Images" or "Show Pictures" in your browsers' preferences/options. If you do this you will soon find out that you are missing lots of information, and that the pages will look a lot duller. If you decide you do want to see a particular image, you can load it by clicking the right mouse button (right clicking) on the placeholder image, and selecting "Load Image" or "Show Image" from the pop up menu. (On a Mac, click and hold the mouse button)


You can save images to your computer (just remember about copyright laws!) by right clicking (or clicking and holding on a mac) on the image you want to save and selecting "Save Image As..." or "Save Picture As" from the pop up menu.


If you see this or this on a Web page, it means that the image couldn't be found (usually caused by a mistake by the person who wrote the Web page).


Home Button: The Home button (in the button bar at the top of the browser) will take you back to your "home" page. You can define the address of your home page in your browser's preferences (or "Internet Options"). You can make it any page you want - it's most useful if you make it a page that you often use as a starting point - English Online for instance.


Reload: The Reload button will load the whole page again from the Web site. This is useful if:

  • <!--[if !supportLists]-->Parts of the page are missing because something happening while it was being loaded;
  • <!--[if !supportLists]-->You are looking at a Web page that changes its content often and you want to view the new content.

New Browser Window: By selecting "New Web Browser" or "New...Window" from the "File" menu you can open a new browser window. This allows you to keep one page intact while you go off and find another page. For instance you might want to keep a page of search results open in one browser window while you use another window to check out the result pages. If you decide the page is not quite what you want, you can close the browser window and return to the list of search results without having to reload it (a good way of doing that is to 'right-click' or 'click-and-hold' a link and choose "Open Link in New Window" from the popup menu).


Friday, June 20, 2008

Language of the Internet

The Net, The Information Superhighway: The Internet

The Web, WWW, W3, W3: The World Wide Web
Web Page: A single Web document. Everything you can see in your browser window at one time (including what you can see by scrolling) makes up one Web page.

Browser, Web Browser: The piece of software that runs on your computer and allows you to view Web pages. The most common browsers are Netscape and Internet Explorer.

Web Site: A set of Web pages that are logically connected. They usually have a consistent look and feel, and are all related to the same theme.

Home Page: The starting, introductory or welcome page for a Web site. A person's own home page is a Web page that describes all about them.

Link, Hot Link, Hyper Link: A part of a Web page that can be clicked to get somewhere else - eg This is a link to the English Online Home Page. Links usually turn up a different colour and/or underlined in your Web browser.

Broken Link: A link that references a page that no longer exists. If you click on a broken link you will get some kind of "Page not found - Error 404" message.

Hypertext: Text that can contain links.

HTML: Stands for HyperText Markup Language. This is the language that all Web pages are written in.

URL: Stands for Uniform Resource Locator. This is the address of a Web page - for example http://english.unitecnology.ac.nz/resources/resources/tutorial/introduction/language.html is the URL of this Web page.

Webserver, Web Server: A Webserver is a computer which holds a number of Web pages, and 'serves' them out to computers that request them. There is nothing very special about the actual computer - it's just an ordinary computer (though usually a fairly powerful one) running special software. Surf: "Surfing the Web" means casually using the Web - not really having any direction, just clicking the links that look interesting to find yourself in weird and interesting places.

Cyber: Virtual - not real but existing only in the context of the Internet.

Cyberspace: A conceptual place that doesn't actually physically exist - but you can roam around in it, visit places, meet other people there, chat to them, go shopping ... Cyberspace is a real world metaphor for the Internet.

Newbie: A person who is new to the Internet, or new to a particular aspect of the Internet such as a service (IRC, usenet) or a particular group (a specific mailing list or newsgroup).

Post: When you send a message to a discussion forum, you're posting. This word can be used as a verb ("I posted a message") or a noun ("that was a nice post").

FAQ: Stands for Frequently Asked Questions. They originate from online discussion forums where more experienced users got sick of answering the same "newbie" questions over and over again. So they started writing lists of frequently asked questions and their answers so newbies could refer to those. The concept has grown, and now a FAQ is more general - designed as an introduction to a certain topic.