Thursday, December 5, 2024

Goodies to Go ™
January 6, 2003– Newsletter #214


Goodies to Go ™
January 6, 2003–Newsletter #214

This newsletter is part of the internet.com network.
http://www.internet.com
 


Featured
this week
:

* Goodies Thoughts –
A JS New Year.
* Q & A Goodies
* News Goodies
* Feedback Goodies  

* And Remember This

 


 

Goodies Announcement

Just in case you missed
it before, the new Beyond HTML Goodies book is now available!

 

Go beyond the basics
and learn how the pros add and use dynamic HTML features and advanced
JavaScript techniques. Beyond HTML Goodies demonstrates dozens of new and
different features readers can add to their existing Web pages using HTML and
JavaScript. The book starts with simple text and image tips, such as adding a
clock to a Web page or causing text to appear when the mouse moves over an
image. It gradually builds to more complex tricks, including manipulating forms
or working with cookies behind the scenes. Throughout the book, readers enjoy
Joe’s snappy style and “to the point” discussion of each “goody” in the book.

 

http://books.internet.com/books/0789727803

 

 

Goodies
Thoughts

A JS NEw Year.

Karl Gustav Jung coined the term
"synchronicity" to refer to those events that, while
on the surface appear disconnected, have something
in common and occur close to each other in time. For
example, you get a new computer and you happen
notice that its BIOS comes from Phoenix
Technologies, you turn it on and check your email
only to find an advertisement for Phoenix
University’s on-line campus. Then the phone rings
and it’s your buddy calling you from Phoenix,
Arizona, where his flight was diverted because of a
storm in your area. That’s synchronicity. When it
happens around me, I say "Huh!"

In last week’s newsletter there was a Q&A piece
about getting a date in JavaScript (see

https://www.htmlgoodies.com/letters/213.html
).
The question wondered why the month always turned
out to be one less than is should be, while the day
and the year were correct. Wally Bamberger had
responded (thanks Wally) with a solution to the
problem. During the week, one of my friends asked me
how he could add the current date to the middle of a
passage in his web page. Then one of the guys at
Jupiter Media (our company) wondered if we use
JavaScript to obtain the correct year for the
copyright notice on our web pages. Meanwhile,
several people wrote back to our feedback email
address concerning the Q&A piece and offering
further explanations. I say "Huh!" Perhaps it’s just
because of the new year and; perhaps it’s
coincidence or; perhaps it’s synchronicity —
whichever it is, it clearly deserves a little
further attention!

Here’s the code that was in the original question:
<.SCRIPT LANGUAGE="JavaScript">
RightNow = new Date();
document.write("Today’s date is " +
RightNow.getMonth()+ "-")
document.write(" "+ RightNow.getDate() + "-" +
RightNow.getFullYear() + ".")
document.write("<.br><.br>You entered this Web Page
at exactly: " + RightNow.getHours() + " hours")
document.write(" "+ RightNow.getMinutes() + "
minutes and " + RightNow.getSeconds() + " seconds")
<./SCRIPT>
(I’ve added a couple of line breaks to make the
result a little easier to read. Also, note the
periods after each "<" — see the note in the Q&A
section below.)

The problem was that the month was turning out to be
one less than expected; for example, 3 would be
returned in April. Wally indicated that he had come
across this before, and provided some code to
compensate. The writers who sent in feedback all had
another part of the puzzle, but it seemed like the
whole thing needed to be explained.

First, no, it’s not a bug! Second, JavaScript starts
all indices at zero, not one. That’s correct, but
doesn’t explain why the month comes out less than we
might expect, but the year and day (and all the time
elements) come out as we expect. To explain it,
let’s take a closer look at the code.

The Date() constructor creates an instance of a date
object, based on the current date and time. In this
case we are creating a new instance called RightNow.
In the document.write statements, several methods of
the date object are used to return elements of the
date and time. This (alphabetical) list describes
them and what they do for us (I’ve included a couple
that aren’t used in the example, but provide some
more useful stuff):

getDate returns the day of the month from the
object. Values are between 1 and 31.
getDay returns the day of the week. Values are
between 0 and 6.
getFullYear returns the full year (that is, four
digit).
getHours returns the hours. Values are between 0
(midnight) and 23 (11 pm).
getMilliseconds returns the milliseconds.
getMinutes returns the minutes. Values are between 0
and 59.
getMonth returns the month. Values are between 0
(January) and 11 (December).
getSeconds returns the seconds. Values are between 0
and 59.
getTime just to throw you off…. this returns the
date expressed as the number of milliseconds past
midnight (GMT) on January 1, 1970.
getTimezoneOffset returns the number of minutes
difference between GMT and the local time zone (they
used minutes because some time zones are offset by a
half hour.)

So why do some start at zero, and some at one? If
you look, you’ll see that those that (unexpectedly)
start at zero, can also be expressed another way.
For example, the day of the week could be Sunday,
Monday, etc. The month could be a number or it could
be January, February, etc. The hour could be 22 or
10pm.

As was pointed out, in JavaScript, indices start at
zero. Suppose we had an array named "months" with
twelve elements defined, containing the names of the
months of the year (for more about arrays, see the
JS tutorial at

https://www.htmlgoodies.com/primers/jsp/hgjsp_26.html
)
Now try this bit of code:
document.write("The current month is " +
months[RightNow.getMonth()] + ".")
Since it returns values starting at zero, getMonth
is perfect for use as the index into our array of
month names! Now we see the method behind the
madness (all puns are, of course, intended!) Exactly
the same applies to the days of the week and to the
hours of the day. Minutes and seconds start at zero
because those are the possible values for minutes
and seconds! The other numbers are returned as the
numbers that they are – they’re not valuable as an
index into some other array.

Great! So why did I try to throw you off with that
getTime thing? What use is it? It’s a timing thing.
You can use it to obtain the arithmetic difference
between one moment in time and another. And the
other one — getTimezoneOffset — well, think
creatively and you’ll come up with a use for it!! It
is interesting to note, however, that
getTimezoneOffset is a method of the Date object,
but doesn’t actually reference the Date object.
Usually, something like that would be an independent
function, but not this bad boy!

Ahh, how joyous is JS!!

Have a JS new year!!

Thanks for Reading!
– Vince Barnes


 

Top

Q
& A Goodies


Questions are taken
from submissions to our Community Mentors. You can ask a Mentor a question by
going to https://www.htmlgoodies.com/mentors/.




Q.  My website is done in tables,
and I have one Cell on the top, three Cells in
the middle and one cell on the bottom. I want to
make it so the in the middle 3 cells, all the
text is forced to the top. I tried td align=top
but that didn’t work.

A. Change the align to valign and code it
like so: td valign="top"

Q. How do I detect a flash plug-in and
redirect the browser to a new URL?

A
. Flash kit had a couple ways. I don’t know
which you need, so here is the search results
page:

http://www.flashkit.com/search.php?term=detect+plug+in&cat=tutorials&version=–&per=10&field=Description&orderby=Rating&andor=or&page=1&submit=Submit

Q. I am constantly creating files (pdf or
word) files that I need to show to many
co-workers. Instead of having to email everyone
everytime I finish a file, I would like to
upload the file to my server and have them view
the list of files online and download the ones
they want. These files need to be password
protected as different people in different
departments should only see files pertaining to
them. Here was my idea, create a bunch of
password protected folders on a server – one for
each department, and I will upload the file to
any folder that should be allowed to view these
files. Two questions: 1) I put the files in a
folder, but when I try to view the folder in a
browser it tells me I don’t have permission to
access this folder (I assume because I never
created an index file). How can I set it up that
I should be able to view a list of files that
are in the folder? 2) how can I create a page
that will allow me to upload files to folders
using a browser?

A
. I believe you are correct in that you do
not have an INDEX file for the server to show
when you try to access the folder. You could
create an INDEX file with the links to the
documents for downloading. I am assuming that
you have already password protected the folder?
An even easier way would be to use a password
log in feature for your pages. The application
would allow users to sign up themselves and you
would control which group the user should be in
and only the documents or files you allow each
group or person to view. There is a nice web
application called ASPLogin. It has to run on a
server that supports ASP. For example, to make a
document available to all users in a group
called ‘management’, members of a group called
‘administrators’ and a user called ‘fred’ (who
may or may not be in either of the groups), you
would add the following code to the top of the
document:
<%@ LANGUAGE=VBScript %>
<%
Set asplObj=Server.CreateObject("ASPL.Login")
asplObj.Group("management")
asplObj.Group("administrators")
asplObj.User("Fred")
asplObj.Protect
Set asplObj=Nothing
%>
Any other group or person trying to see that
document will not be allowed to see it. It is a
pretty slick application You can take a look
here:
http://www.asplogin.com

To create a page to allow you to upload
documents would call for some scripting. This
all depends on what type of server you site is
hosted on. If it is a Windows server then it
will support Active Server Pages (ASP).

Q. I saw on a website once where there
were dainty little buttons that did the
equivalent of a browser’s back, refresh, and
forward buttons. I found the JavaScript code for
that on Html Goodies, but is there no way to
apply this event to a hotspot on an image? With
the script on the website, I’m under the
impression it is written to create a standard
form button with the back (etc.) abilities. I
have an image on which I want to select a
hotspot which will act as a back (etc.) button.
Help?

A. What you are looking for is called an
image map. Here is a link to a tutorial on the
HTMLGoodies web site:

http://htmlgoodies.earthweb.com/tutors/im.html


It is best to have a tool to assist you in
defining the hotspots of an image so check your
Dreamweaver documentation for references to
image maps. If you find this to be lacking,
there is an excellent piece of shareware called
MapEdit available from boutell.com at:

http://www.boutell.com/mapedit
  At $10
it’s a bargain.

Q. Is there something you could use so
that when the mouse moves over a link it would
look like a regular text, meaning that the
mouse-pointer would turn into an I shape
instead of a hand?

A. This tutorial will explain it:

https://www.htmlgoodies.com/beyond/css_cursors.html


Something to be aware of is the effect can vary
between browsers. Test it at least in the recent
IE and Netscape to make sure nothing is screwed
up.
 

 

 

 

Top

News Goodies


Investors Slam Door on Hotels.com
[January 6, 2003] Wall Street sends the stock
down 25% after the booking service says 4Q revenues
and earnings won’t meet expectations; travel, online
and off, remains a sector in disarray.

Click
here to read the article

 

VeriSign Re-launches Network Solutions Brand
[January 6, 2003] Almost three years after acquiring
Northern Virginia-based domain registrar and
renaming its VeriSign Global Registry Services,
Network Solutions lives again.

Click
here to read the article

 




Palm Licenses New OS to Korean Firm
[January 6, 2003] With the help of Motorola’s
old wireless ReFLEX network, the handheld computer
maker’s software spin-off adds to its list of OS 5
licensees.

Click here to read the article

 




Apple Polishes Up for Macworld 2003
[January 3, 2003] UPDATE: Woz is back and Jobs
has big news as the Mac faithful assemble in San
Francisco for Apple’s annual love-fest and rumor
mill.

Click here to read the article

 



 

Kodak Ready to Bridge Film and Digital?
[January 3, 2003] With CES 2003 around the corner,
one analyst thinks Kodak is being underestimated,
largely due to a new technology that may bridge the
gap between film and digital photography.

Click here to read the article

 

 

Violence Breaks out in Los Angeles Cyber Cafes
[January 3, 2003] Popular combat simulator games are
seen as catalysts for street brawls that have Los
Angeles police and city council members scrambling
for solutions.

Click here to read the article

 

 

Sun Scraps MySun E-mail Service
[January 3, 2003] Sun Microsystems joins the trend
among big-name companies to discontinue free e-mail
services.

Click here to read the article

 

 

New Dolby Tech Sounds Good to ADI Chipsets
[January 2, 2003] The sound specialists at Dolby
Labs put their Virtual Speaker technology in
chipsets for use in TVs, stereos, video-game
consoles, in-car entertainment systems and DVDs.

Click here to read the article

 

 

 

E-Comm Industry Gets a ‘C’ Despite Record
Spending

[December 31, 2002] Despite the fact that consumers
spent record amounts of money doing their holiday
shopping online this year, online retailers only
earned a ‘C’ rating for customer satisfaction.

Click here to read the article

 

 

 

 

 

Top

Feedback
Goodies


Did you ever wish your newsletter was an easy two way communications medium?
Ploof! It now is!
If you would like to comment on the newsletter or expand/improve on something
you have seen in here, you can now send your input to:

mailto:nlfeedback@htmlgoodies.com

We already receive a lot of email every day. This address will help us sort out
those relating specifically to this newsletter from all the rest. When you send
email to this address it may wind up being included in this section of the
newsletter, to be shared with your fellow readers.
Please don’t send your questions to this address.
They should be sent to our mentors: see

https://www.htmlgoodies.com/mentors/

According to the stats, about four hundred of you
actually went to take a look at the slug site (http://www.UpperLowerbury.com/slugs)
and about a third of that number also took a look at
the site’s home page. Thanks for visiting! Thanks
also for the notes some of you sent me — you know
who you are and what you said <g>! What’s life
without a little humor? Thanks also to Mary S who
sent me a slug with a Swedish heritage. What a cutie
it is too!! Did you find that one in Upper Lowerbury,
Mary?
 

 

 

Top
And
Remember This
. . .

On this day in…

1919: President Theodore Roosevelt dies
The 26th President of the United States died at his
estate, "Sagamore Hill" in Long Island, NY, on this
day in 1919. In 1898 Roosevelt was assistant
secretary to the Navy and was a strong proponent of
going to war with Spain. When the Spanish-American
war began, he formed a volunteer cavalry known as
the "Rough Riders", who are famous for their part in
the victory at the Battle of San Juan Hill in Cuba.
With his military fame he easily won election to the
post of Governor of New York in 1898 and became
Vice-President of the US in 1900. When William
McKinley was assassinated in 1901 the 43 year old
Roosevelt became the youngest president ever to
assume the office. He was elected to a second term
in 1904. Roosevelt insisted on a strong Navy,
independence for Panama and the construction of the
Panama Canal. He created the first National Parks
and National Monuments. He negotiated the peace that
ended the Russian-Japanese war, for which he was
awarded the Nobel Peace prize. In 1902, Roosevelt
went on a hunting trip in Mississippi and made
history by not shooting a bear cub. Washington Post
political cartoonist Clifford Berryman drew a sketch
called "Drawing the Line in Mississippi," and the
cartoon inspired a couple of shopkeepers in New York
to make a little bear cub toy which they called
"Teddy’s bear". At the same time, Margarete Steiff
in Germany created her first Bear toys based on
drawings of bears her nephew made at a local zoo.
Teddy Bears are still popular today. At his death,
Roosevelt was 60 years old.

1412: Joan of Arc (Jeanne D’Arc) was born
The Maid of Orleans, the French heroine who
liberated the city of Orleans from the English was
born on this day in 1412. After leading French
armies to many victories, and claiming that she was
spoken to directly by God, which caused great
concern among Church leaders, she was burned at the
stake as a witch. She has since been canonized a
Roman Catholic saint.

 



Thanks for reading
Goodies to Go!


 




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