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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

what is abiotic and biotic factors?
Hira Reply
which of the following shows the correct sequence of the cell cycle
Kameishia Reply
who is name virus
Shivam Reply
centromere consist of
Shivam
meeting point of two chromatids
Cffrrcvccgg
Explain the function of nematocysts in cnidarians?
Israel Reply
The nemotocyst is used by Cnidarians (hydra, jellyfish, sea anemones) to sting their prey and any threatening enemy.
Lee
photosynthesis in plants is an example of what ? (a) excretion (b) irritability (c) nutrition (d) reproduction
Lee Reply
If a Hox 13 gene in a mouse was replaced with a Hox 1 gene, how might this alter animal development?
Israel Reply
Which of the following organisms is most likely to be a diploblast?
Israel
what are reactions of photosynthesis?
Maria Reply
what are the probabilities of blood genotypes for the offspring from a cross between a mother lAlA blood and a father with lBi blood?
dayana Reply
what is matter
Emmanuel Reply
matter is anything that has mass and can occupied space
Alice
weight
Alice
example of matter
Oyekemi
You serves as an example of matter Because matter is anything that has mass and occupy space e.g man and every other things that exist on earth.. So think of every other things around you ...
Biola
and you too
Oyekemi
We generally
Biola
What is ecological management
Oyekemi
how the kidney functions as osmoregulatory organ
Sam Reply
That true
Banda
what is the major connection for sugars in glycolysis?
Ibrahim Reply
Simple term of science
Palesa Reply
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gopal
it's means what do u know about biology?
Phathu
what is immunisation
Melysa
the action of making a person immune to infections ,for immunisation
Kalia
what is the biology? what do you know about biology
Phathu Reply
biology is the study of living organisms, divided into many specialized fields that cover their morphology, physiology, anatomy, behavior, origin, and distribution.
Julia
The study of all aspects of life. The study of all living organisms (such as animal cells and plant cells) in greater detail (their structure and how they function). It's a very broad science.
juanita
what is prokaryotic
Bhaskar Reply
what is pathogens
Bhaskar
pathogens are a bacterium, virus, or other microorganism that can cause disease.
Lee
transistion metals....
Wasik Reply
watter drie vakbonde is betrokke by die onderhandelings
ferdi 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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