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Run the script

To run this JavaScript script:

  • Copy all of the text from the body of Listing 1 into your plain text editor and save the file with an extension of .htm (test.html forexample).
  • Open that file in your browser. (In most cases, you should be able to simply drag the file and drop it onto an open browser page to open it. Ifthat doesn't work, open it from the browser's File menu.)

And the result is...

When you do that, the text shown in Figure 1 should appear in the browser window.

Figure 1 . Output from script in Listing 1.
Insert JavaScript between script tags. Hello from JavaScript

That's all there is to it

All you have to do to write and run a JavaScript script is to:

  • Copy the text (often referred to as code or source code) from Listing 1 into your plain text editor.
  • Replace the code between the two lines containing the word script with the code for your new script, leaving the two lines containing the word script intact.
  • Save the file with an extension of .html. (The file can have any legal file name so long as the extension is .html.)
  • Open the new html file in your browser.

When you do that, the script code will be executed.

Display results in the browser window

If your script code contains statements that begin with document.write , followed by a pair of matching parentheses, (as shown in Listing 1 ), the code in the parentheses will be evaluated and the results of that evaluation will appear in your browser window.

At that point, you will have access to your script code as well as the results of running your script usingyour screen reader and your Braille display.

Strings

In programming, we often refer to a group of sequential characters (such as your first name) as a string . In JavaScript format (often called syntax), such groups of characters are surrounded by matching quotationmarks to cause the group to be recognized as a single string.

The following strings appear in the JavaScript code in Listing 1 :

  1. "Insert JavaScript between script tags."
  2. "</br>"
  3. "Hello from JavaScript"

The first two strings appear, separated by a comma, inside the matching parentheses following the first occurrence of document.write . (We often call the items inside the matching parentheses the argument list.)

The last item in the above list appears in the argument list following the second occurrence of document.write in Listing 1 .

Screen output

If you examine Figure 1 , you will see that the first and third items from the above list appear, without their quotation marks, in the browser window. However, the second item does not appear in the browser window.

Purpose of document.write

Although this is a simplification, for purposes of the modules in this collection, it will suffice to say that the purpose of the document.write command is to cause the items in its argument list to be displayed in the browser window. You can place one or more items in the argumentlist. If there is more than one item in the argument list, the items must be separated by a comma as shown in Listing 1 .

Displaying strings

Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Accessible physics concepts for blind students. OpenStax CNX. Oct 02, 2015 Download for free at https://legacy.cnx.org/content/col11294/1.36
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