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3.8: Linking Pages

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    The original purpose of the World Wide Web was to provide a mechanism for non-linear access to information. In order to activate this type of retrieval, information is packaged as a set of Web pages, and then hypertext links, or hyperlinks are created to navigate from one page to another in whatever sequence the reader prefers. In a later tutorial, the varieties of page links are discussed more fully. Here you are introduced to the basic concept of linking and shown how to set up text links for navigation between pages.

    Most often a link from one page to another is made by creating a text "hot spot" on one page that, when clicked with the mouse, opens a second page which replaces the first page in the browser window. The string of text that is made sensitive to a mouse click can be a single word or several words, usually suggestive of the contents of the destination page. Normally, a second link appears on the linked page for return to the original page. It is considered poor Web citizenship to leave visitors at the end of a series of links with no way to get back to the starting page.

    In the illustration in Figure 2-26 two text links cause navigation to different pages. On the linked pages a text link provides for return to the original page.

    Illustration of text linking browser pages
    Figure \(\PageIndex{1}\): Text links between pages. ("MGA Web Development Tutorials" by Floyd, Kevin; Kwak, Myungjae; and Stines, Alan, Computer Science and Information Technology Ancillary Materials. 4GALILEO Open Learning Materials is licensed under CC BY-SA 4.0)

    You can test these links by clicking the "Linking Web Pages" text link below. The original page is opened in a separate browser window. From there, you can link to and return from two different pages.

    Linking Web Pages

    The <a> Tag

    The most common type of link is a clickable word or phrase that transfers directly to the target page. A text link of this sort is created by surrounding the text string with an <a> tag (also called an anchor tag), and specifying the location of the page to which to link. The <a> tag is classified as a container and inline-level tag. The basic format for coding this tag is:

    <a href="url">linking text</a>

    The href (hypertext reference) attribute specifies the URL of the linked page. Links can be made to other pages at the local Web site or to pages at remote sites anywhere on the World Wide Web.

    If the linked page is in the same location ‒ in the same directory ‒ as the linking page, then the URL is simply the page name. This local link is called a relative link since the path to the linked page is relative to the location of the linking page.

    When linking to a remote site, the URL must be a full Web reference including the "http://" protocol followed by the domain name of the site. This external link is called an absolute link since the path to the linked page is a full Web address.

    The <a> tag surrounds a string of text that is to be made click-sensitive and that activates the link. Usually the text is descriptive of the destination link. It can be a single letter, a word, a phrase, or any amount of text that can reasonably serve as a link. When this text is clicked, the linking page is immediately replaced by the linked page in the browser window.

    The <a> tag is an in-line tag. It does not add any new lines or spaces before or after the content which it wraps.

    Local Links

    When creating your own Web site, most of the links will be between your own pages. The easiest way to store these pages for linking is to save them in the same location. That is, in the same disk directory or on the same diskette or storage unit. In this case the URL specified in the <a> tag is simply the name of the page.

    In the example in Figure 2-26 there are three Web pages named Home.htmOrganize.htm, and Supplement.htm. The Home.htm page contains text links to the other two pages and is coded as follows.

    <h2>Linking Web Pages</h2>
      Navigation between pages of a Web site is made possible through hypertext
      links. One or more words on a "linking" page are made sensitive to mouse
      clicks that take the reader to a different "linked" page. There are two main
      reasons for breaking up a topic into separately linked Web pages:
      <a href="Organize.htm">Topical Organization</a><br>
      <a href="Supplement.htm">Supplemental Information</a>
      When creating links between Web pages it is important to provide return
      links to the linking pages. The page author should not leave readers dangling
      at the end of a series of links with no direct way to return to the home page.

    Notice the line containing the code

    <a href="Organize.htm">Topical Organization</a>

    An <a> tag surrounds the string of text "Topical Organization" to convert it into a hyperlink to open the Organize.htm page in the browser window. Only the name of this page is required as the href URL since the linked page appears in the same directory as the Home.htm page from which the link is made. Similar coding links to the Supplement.htm page. When either of the two links is clicked, the associated page is retrieved and loaded into the browser, replacing the Home.htm page.

    When either Organize.htm or Supplement.htm are showing in the browser window, it is easy to return to the Home.htm page by clicking the Back button on the browser's Tool Bar. However, it is a better navigation solution to code your own internal links between pages. In other words, both the Organize.htm and Supplement.htm pages should include, as shown here, their own links back to Home.htm.

    Coding for the Organize.htm page is shown below. Here the string of text "Return to Home" is made into a link by surrounding it with an <a> anchor tag. A click on this link reopens the Home.htm page in the browser window. Similar coding appears on the Supplement.htm page to return to the home page.

    <h2>Topic Organization</h2>
      One of the reasons for breaking up a Web topic into separate pages is
      that there simply may be too much information for inclusion on a single Web
      page. For the same reason that books are divided into chapters and chapters
      are divided into sections and sections are divided into paragraphs, a Web
      topic may need to be divided into logical units that are packaged separately.
      Rather than being presented as a single continuous stream of text, the topic
      is organized into related chunks of information that are suggestive of its
      overall structure and that provide for isolated reading of the separate
    <p><a href="Home.htm">Return to Home</a></p>

    The manner in which you set up links between your pages is at your discretion. To a large extent, it depends on how you subdivide your site into separate pages and the way in which the separate topics relate to one another. Make sure there are no "dead end" pages where visitors arrive with no way to get back to where they came from.

    Remote Links

    If you know the URL of a Web site anywhere on the World Wide Web you can make a link to that site. This URL is normally in the form

    http://domain name

    where the http protocol prefixes the site location (domain name). This type of absolute reference takes you to the home page of that site. The following link code, for example, is used to open the home page at

    <a href="">Go to Google</a>
    Go to Google

    To find out the URL of a Web site simply go there and read the URL that appears in the Address box of your browser. Copy this address into the href attribute of your <a> tag and add the text to make a clickable link.

    If you are linking to a particular page at a remote site then the domain name is followed by a path through the directory structure to the specified page. For instance, the following URL accesses a page at containing links to various business sites and services.

    <a href="">NFL Teams</a>
    NFL Teams

    This page is located in the teams subdirectory of the nfl directory of the site. The URL is taken from the browser's Address box for the displayed page.

    Link Colors

    Depending on your browser's settings, a text link shows up in different colors as a visual clue to the status of the link. Before a linked page is visited for the first time its text link displays in blue. After the page is visited, the link changes to purple. You can tell at a glance whether or not you have previously visited a page.

    Unvisited Link
    Visited Link

    In a later tutorial you will learn how you can change these default colors for links that you code.

    The target Attribute

    By default, linked pages are opened in the same browser window as the linking page subsequently replacing it. When linking to a remote site, a risk is that your visitors will navigate the remote site and eventually lose contact with your site. They can repeatedly click the browser's Back button to get back to your site, but if they have wandered around the remote site to any great extent then backing up to your site may be impractical. You end up losing your visitors to the remote site.

    One way around this problem is to always link to remote sites in a separate browser window. It is quite easy to open a page in a different window. Simply add the attribute target="_blank" to your <a> tag as shown below for the above link to the Google site.

    <a href="" target="_blank">Go to Google</a>

    With this technique, visitors can browse the remote site as much as they wish in a second browser window, and by closing that window return immediately to your linking page in the original window.

    Creating text links as described here represent only a couple of the ways in which hyperlinks can tie together multiple Web pages. In a later tutorial, other varieties of links and linking methods are discussed.

    3.8: Linking Pages is shared under a not declared license and was authored, remixed, and/or curated by LibreTexts.

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