CHAPTER 2
HTML Food ProcessorsTOC



Thrice diced, sliced
lovely spider meal ...
pared, flared not spared
sumptuousity!


Using A BrowserTOC



Browsers are incredibly easy to use. So easy in fact, that you can use a browser on the World-Wide Web your whole life without having to use any pull-down menus. While this may be true, you certainly will not make the best or most efficient use of a browser unless you take the time to become familiar with the menus. There are many preferences and options which will make your browser run like a charm. The following is a summary of some of the menu commands in a typical browser. There are too many browsers to enumerate all the possibilities. I have considered the features of many popular browsers and have compiled a list to illustrate the ease of use.

Menu Bar pic
A Typical Menu Bar


The list is intended primarily to help you organize the presentation of the browser system to your students. You will find that no browser corresponds to the mythical browser discussed in this section. I have combined the features of many different browsers into this section. Still, most browsers will have many of the same features. How they are presented by your particular brand of software will vary a great deal. Keep this in mind as you peruse this list. Make your own personal list for your browser. There is a reference list for Mosaic, Netscape and Internet Explorer at the end of this chapter.



  • The File Menu usually contains:
    • "Open Local File" or an "Open File" command which opens a dialog box with the ability to browse your computer for the desired file.

    • You may place an address of a website either in the Document URL line or open a "Open Location" dialog box.

    • Print functions.


    File Menu
    Using a File Menu


  • The Edit Menu usually contains
    • " Copy " This will allow you to click on the address label in the URL window and copy onto the clip board. From there it may be pasted into another document, say a homepage anchor-hyperlink address line (i.e. href= " ... "). On IExplorer 3.0 you must use the right button on the mouse.

    • "Paste" This will allow you to paste the URL address into the "Address" line any URL address saved from the last copy to clip board. You may also use this to paste the address into your text documents. This is a great time saver. command.

    • "Find" This will allow you to look for a keyword within the given webpage. Suppose you wish to find the word "whale" on the webpage you are currently viewing, this is the menu item for you. pen a webpage



    Edit Menu
    An Edit Menu


    View Menu
    A Sample View Menu


  • The View Menu usually contains

    • "View Source Document" This item will allow you to view the HTML file which produces the webpage. This is an excellent learning tool. Most weblings begin learning HTML by viewing the source code and writing webpages that resemble their favorite websites.

    • "View Document Information" This feature contains information about the structure and the way in which the file is handled. You can sometimes view In-line images using this feature.

    • "Reload/Refresh Source Document" This is particularly useful when you are writing webpages. Each time you save your HTML document, you may reload and view the changes. Also, sometimes a file does not load properly. If this happens, reload the file.




  • The Options Menu usually contains a dialog box for setting preferences.


    • General preference may include the appearance, fonts, image and color choices for customizing your browser as well as the homepage or startup page address.

    • Internet preferences allow you to customize e-mail, ftp, caching operations as well as activate or disable special features such as javascript

    • Security preferences allows you to set up passwords for a browser when you do not want students using it unattended.


    Options Menu
    A Cardfile Options Menu


    Bookmarks Menu
    Bookmarks Menu


  • The Bookmarks/Favorites Menu usually contains


    • "Add a Bookmark" This feayure puts the current URL address into a list which can then be easily accessed in the "Go To Bookmarks" menu item.

    • "Edit/Remove Bookmarks" will allow you to edit your Bookmark file and remove old or unnecessary bookmarks.

    • "Open/Go To Bookmarks" allows you to see your Bookmark file and click on an info/homepage Title and fetch the corresponding page.



A Note on Hot ButtonsTOC

    Most browsers have a search engine "Hot Button " or have a search engine call from a menu item. Every browser is different, so explore your browser and determine the capabilities of it's menu lists. In addition to the menu listings, there are "hot buttons" located at the top of the page which are typically shortcuts to the menu items. These buttons are the most commonly used items such as Bookmarks, Reload, Home, Back (one document source file), Forward (one document source file), Print, et cetera.


spider comic




Using a Search EngineTOC



Search engines on the Web can be very powerful and impressive tools ... if you don't quite know what you're looking for. On the other hand, if you do not use appropriate, or useful keywords, the number of hyperlinks which appear can be enormous. Some search engines use the technique of filtering to ensure that the weblian does not find inappropriate material. Filters are not always reliable. It may err on the side of eliminating completely inoffensive material, or may not catch the indications that a site should not be rendered. Searches should be supervised or previewed. It may be worthwhile to check the outcomes of keyword searches before your students attempt them. Each search engine is different and the outcome of the search will vary from engine to engine. If you do a little homework in advance, searches can be an excellent tool for educational scavenger hunts. In general, undirected searching is time consuming and not recommended. This being said, consider the following project which uses search engines to get your students started on the World-Wide Web.



Conducting Successful SearchesTOC



Using search engines effectively, just like anything else, requires some practice and some knowledge about how search engines work. There are several different methods involved in searches. In one kind of search, the search engine looks for key words in the document title section. But as you can imagine, there are millions of possible documents to search. Some searches look beyond the title to the opening data tables and headlines. As more searches are done the engine "becomes smarter" and keeps lists of important information. The search engine also keeps an account of what has been searched for and how often an item in a list is requested.

The fact is, search engines are not as advanced as you might think. The original search engines were designed for use in small help-page systems. For search engines to improve they must become better adapted to the individual and they must make better use of the methods of artificial intelligence.

If you have done many keyword searches, you might have found that such searches are somewhat time consuming. Faced with a list pages long, you search and search only to find what your looking for on the last page or not at all. There are some shortcuts that can be helpful.

  • Try using the category lists to narrow the search. If the search engine is well constructed it will take note of the category choices you have made and attempt to build lists using this information.

  • Some search engines provide a list with a clickable object next to each item saying "More like this." Once again, you have an opportunity to give the system more knowledge about your search preferences.

  • Try using advanced searches. These include using AND between words. A period following the keyword on Lycos means the exact word only. Also, use a dollar sign on Lycos for the wild card. On Magellan, use a plus sign in front to indicate exact words and a minus sign to eliminate words. But, rather than list the disjoint possibilities, let me recommend that you read the help-page for your favorite search engine.

  • Explore lists that have been compiled by others. Sometimes these lists appear during engine searches, but sometimes they can be found in round about ways. Examples will be given later in this section.

  • Use web-guides. See for instance the following URL address

Lets begin, for instance, with a Search Engine that had no educational listings on its homepage the day I wrote this sentence. Instead it had a clickable button that said "Site by Subject". By clicking on the button I obtain a list of subjects, one of which is Education. Later this same search engine provided a list of subjects on it search page.

A Search Engine List

A Portion of the Search Page


By choosing the education list, I narrow the field. Now I obtain another list related to educational topics. Since I am interested in K-12 educational resources, I choose the corresponding category.

A Search Engine List

A Portion of the Education Page


Finally, we obtain a list of hundreds of educational resources. Some are of questionable worth. Others do not really belong on the list. I have culled out two exceptional resources that should lead to more connections later on. One is

         

By searching quickly at this site we obtain one of the most thorough and well reviewed resource lists on the World-Wide Web. Note the designation " au" in the URL address.

A List of Educational
Resources

A List of Educational Resources



When Should I Use a Bookmark?TOC



How many times have you found yourself looking for a webpage that you had seen recently? Perhaps you meant to bookmark the page, but you forgot when you followed a hyperlink from that page. It is not advisable to bookmark every webpage. Eventually, the more important bookmarks will be obscured by the vast number. Also, bookmarks are not always descriptive, especially, when they are taken from a common website. Another problem is that while the website may be interesting the title description is incorrect. This can lead to confusion later on. If you create a large list of bookmarks you will find that you must go back and edit outdated or unimportant ones. Editing bookmarks can be very time consuming, especially, if you don't want to lose your favorite ones. Here are some tips for the use of bookmarks:
  • Use bookmarks sparingly and edit the list when it grows large.

  • Use bookmarks and later create a set of listpages for your favorite websites using the HTML list format, or the HTML definition format.

  • As you add your favorite bookmarks to a listpage remove the bookmark listing by editing the bookmarks. Examples of listpages will be given in the chapter on lists.


A Note on FramesTOC

    Many websites use frames. Frames allow the programmers at the site to use better programming techniques. For one thing, when frames are used, old webpages can be eliminated without having recourse to rewriting all the hyperlinks. On a large site, just keeping track of hyperlinks can be an enormous task. If you want to bookmark a webpage that is framed, you will only get the framepage, i.e. the page that shows frames of the other webpages. Do not despair. Instead, place your mouse pointer on the URL address/hyperlink and watch the hyperlink view-screen. Pull down your bookmark list and add the URL address. This can usually be done by adding the bookmark manually. On Netscape 3, use the "item" pull-down menu in the bookmark file. Do not forget to verify that the bookmark works, before you move on.


Using a History ListTOC



Using the history list on your browser can save you time. Generally, the browser will save a short list or "Go" list and a more complete history list of your session. This will allow you to backtrack quickly without using the backup button. The full history list will also contain URLs, or http addresses. This additional information can be useful. Here are some tips about using your history list:
  • Avoid backtracking in your history list at a website by using navigation bars. Before you leave the site, review your history and bookmark the really special pages at the site.

  • Make sure that you bookmark one of the navigation pages, or indexpages, at your favorite sites. Even if you have only the indexpage, you can often find other material at the site of interest by using the single bookmark.

  • Remember that when you backtrack using the browser and then take a different path, you will lose the history list that you just backtracked over. Think of the history list as a book that you edit. When you backtrack, you tear out the pages. When you go forward you put torn pages back. When you choose a hyperlink you add pages, but you also eliminate any set of forward pages.


A Note on Backtracking TOC

    While the history list is a convenience, it will not keep an exact accounting of everything you do during your session. You may lose the addresses to major portions of your session if you backtrack and use a hyperlink.


History as a Time LineTOC



Why does the browser eliminate the set of forward pages when I backtrack and then access a hyperlink? Presently all navigation bars are linear. That is to say, the visited webpages are all ordered in a straight line, or chronology. You can only go forward or backward. This is to the advantage of the weblian as well as the programmer. Non-linear systems are extremely complex. If the program designer were to construct such a non-linear history list it would be difficult for the typical weblian to use. A non-linear history list would look something like a web and would probably require a separate window to be used.

Future browsers may allow for the non-linear history list design feature. Each point with more than one outgoing path would be called a node. The feature would require the construction of a history map probably using a graphics format. Still, such a history list could become complicated very fast.



How to Open A Local DocumentTOC



To browse a local document either on the hard drive or a floppy, use the "File" pull down menu on the "Menu" task bar and choose "Open Local Document", or "Open File", as below.

Open a local file

Opening a Local File


Remember that opening a local file is really no different than opening any URL. Once you open a local HTML document with your browser you may access any other locations world-wide just by clicking on a hyperlink. The foregoing comment assumes that the browser is connected.

If you have a modem you can browse your local machine, without using the modem, simply by starting the browser without connecting to your internet service. However, you will not be able to access any URL addresses. If you try to access external URL addresses when the modem is not connected, the browser may allow you to view items that are already stored in the its cache.

Project Code Name:



ReferencesTOC