JavaScript - 0002

2011-12-12T18:42:00.001-08:00

Continued from:
http://schematron.blogspot.com/2011/11/javascript.html

Statements define what will the script do.
Statements in JavaScript are optional to end with semicolon, just a new line marks the beginning of a new statement.
Statements in JavaScript are mostly of following types.:

Conditional (if-then-else)
Comments (// ...) (/* ... */)
Object Manipulation
Loop (while-do)(for-)
Exception Handling

JavaScript - 0001

2011-11-28T16:27:00.001-08:00

Some of the text here is the learning from a superb and superior website - http://www.tizag.com/javascriptT - for learning many languages and scripts.

JS is a client side scripting language.

The browser on the client's machine will run the script.

It will help a web master to do more using the standard HTML and CSS.

<html>

<head/>

<body>

<!--

document.write("how are you")

//-->

</script>

</body>

</html>

Make sure that the 'javascript' is enabled in your browser.
javascript - related functions can be put in the header, body or separate file (.js), as required.
<script src='jsfilename.js'/>
You may not need to write all the javascripts your self as pre written functions are available on website for free. Just download/copy to use and modify if required !
We do not necessarily use a semi colon if we write separate statements on separate lines. Use of semicolon (;) is mandatory if many js statements are written on the same line.

Various functions, operators (arithmatic etc.) and variables are used:

var var1=5; var var2=12; var answ=var1+var2;
document.write(answer is = ); document.write(answ);
same variable can take as many values in a script as we want while we go on writing a script.
javascript variables cannot be reserved words, cannot start with numbers, good to use underscore and good to start with a lower case alphabets(a-z).

List and Types of operators are:

arithmetic... - * + / %
assignment... =
comparison... == != <= >= < >

Functions in javascript is used by writing:

function funcname1() {put all the statements for functions in curly braces here}
we can use functions in functions.
functions are used by calling them with their name funcname1() where required.

Events in javascript are one of the most exciting things:

javascript has a lot of predefined events and their names.

??? What are objects and methods in JavaScript.

Continued to:
http://schematron.blogspot.com/2011/12/javascript-0002.html

assert or report

2011-10-27T20:25:00.000-07:00

which is a preferable way to test the xml "assert" or "report".

e.g.

<assert test="ns1:element1[@attrib1]">the attribute 'attrib1' of the element "element1" is missing</assert>

OR

<report test="ns1:element1[not(@attrib1)]">the attribute 'attrib1' of the element "element1" is missing</report>