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point a: click his/her way around the world on the Internet by using only the
mouse. However, graphical browsers requi the web client computer to have
graphics capabilities of handling and displaying multimedia data. Therefore, i web
client computer has graphics capabilities, such as a Windows, Macintosh, or
XWindows machine, then it c be loaded with a graphical browser to allow its users
to have a visually more spectacular Internet surfing compared to a line browser.
These are many graphical browsers available today with names like Mosaic,
NetScape, Cello, Viola, MacWeb, Internet Explorer, etc. Out of these, Mosaic is
the best known and probably the most popular one. It is distributed free of charge
by the NCSA (National Center for Supercomputing Applications). There is also a
commercial version of Mosaic available now called NetScape, which is becoming
the de-facto standard for browsers. Internet Explorer is also a very popular
To give an idea of a graphical browser, Figure.,18.2 shows how the initial screen
looks like when Internet Explorer is invoked.
Note that in case of a graphical browser, a hypertext link can be shown on the
screen in multiple ways such as a labeled button, highlighted (bold and/or
underlined) text, or different color text than normal text if the computer has a color
display, or author-defined graphics symbols. If the computer has a color display,
the usual default is for links to be in both blue and red colors. Blue links are places
you haven't visited yet in your current Internet surfing session and Red links are
places you have already visited. In other words, once you click on a link and go to
that place, if during the same session you ever come back to the text from which
the hypertext jump was made, it will show up as a red link indicating that you
have already visited the place of this link. This little navigation helper is a great
time-saver if you are jumping from server to server searching for information on a
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This document was uploaded on 04/07/2014.
- Spring '14