Some useful scripts:
Javascript
Jeff Williamson
Northern Virginia Community College
www.nvcc.edu/home/nvwillj/html-graphics/
nvwillj@nvcc.edu
Scripting conventions
A few conventions in Javascript are present in every script. Knowing them early on makes scripts easier to read.
1. Every script must come between <SCRIPT> tags. The <SCRIPT> tag may also include attributes for language and version:
<SCRIPT LANGUAGE="JavaScript1.2">
I will skip language and version attributes in these pages just to keep code examples as short and readable as possible.
2. Browsers should ignore data between unknown tags, so non-Javascript enabled browsers should just skip Javascript commands, right? Nah - they display them. Or they will - unless - you place your Javascript in HTML comment tags:
<SCRIPT LANGUAGE="JavaScript1.2">
<!--
javascript commands
-->
</SCRIPT>
Which browsers are we talking about here? According to Tom Negrino
and Dori Smith, the list includes
- Netscape 1x
- MSIE 3x and earlier
- AOL 3x and earlier
3. Comments in Javascript can be written two ways:
// precedes single-line comments/* and */ encloses multi-line comments
Double-slashes are more commonly used than slash-asterisks for comments. However author/programmer Danny Goodman points out that slash-asterisks are useful for commenting out segments of code in testing.