JavaScript Tutorial Part I- Some Basics
By Will Bontrager2004-02-09
Some programming basics
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The JavaScript program lines above the <body...> tag are interpreted and appropriate lines executed before the HTML page is loaded. The JavaScript below the <body...> tag is interpreted and appropriate lines executed at the same time as the HTML page.
JavaScript program code that must be put above the <body...> tag are
(1) any that must execute before the entire page has
finished loading, such as code that immediately
determines what kind of browser the visitor is
using, and
(2) functions (we'll describe what they are and other
stuff about them in a later part of this series)
that are called within the <body...> tag.
JavaScript program code that must be put below the <body...> tag are any that adjust the page's visual elements, such as printing text or displaying graphics.
Oftentimes, it won't matter whether the program code is above or below the <body...> tag. Many programmers, this author included, usually opt for the "above" position. It helps keep all or most of the program code in one place rather than scattered about.
Tutorial Pages:
» JavaScript Tutorial Part I- Some Basics
» Orientation
» How the browser knows it is JavaScript
» This is how JavaScript works
» Some programming basics
» How to make your program remember things
» Here it is, all put together
» Using strings of characters
» To come
Copyright 2004 Bontrager Connection, LLC
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