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Basic JavaScript
JavaScript allows you to adding programming functions to
your web pages. Browsers will read the HTML and interpret
the JavaScript. JavaScript can also produce dynamic effects
using variables. JavaScript can also react to events, write
HTML code and validate data.
The main parts of javascripts are functions and events. Functions
are mini scripts that can be executed by an event such as
a timer or a user clicking on a link. Take a look at this
basic script that brings up a gray dialog box saying 'Yey!
javaScript Rules!'
<script language="JavaScript">
<!--
function yey() {
alert('Yey! JavaScript rules!')
}
// -->
</script>
The java is in a standard script tag (which you will read
about next) and also has <!-- and // -->. This hides
the script from old browsers to prevent area.
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