September 2001
Intermediate to advanced
640 pages
31h 42m
English
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DHTML Examples
Now that you have a basic understanding of the Document Object Model and know how to create layers, we can look at some useful examples to get you started on your own DHTML sites.
Rollover Style Changes
We already examined this script
back in Example 29-1. When the user rolls the mouse
over a link, the style of the text is changed to be red and
underlined. This is done by manipulating the style
property of links via the DOM. As we discussed earlier, the
style property gives access to all of the CSS
properties for an element. Using JavaScript, we can change the values
of the color and textDecoration
CSS properties when particular events occur. In this case, we use the
onMouseOver and onMouseOut
events. Here’s the script again, to refresh your memory:
<html>
<head>
<title>Rollover Style Changes</title>
<style>
<!--
a { text-decoration: none; }
-->
</style>
<script>
<!--
function turnOn(currentLink) {
currentLink.style.color = "#990000";
currentLink.style.textDecoration = "underline";
}
function turnOff(currentLink) {
currentLink.style.color = "#0000FF";
currentLink.style.textDecoration = "none";
}
//-->
</script>
</head>
<body bgcolor="#FFFFFF">
<a href="#home"
onMouseOver="turnOn(this);" onMouseOut="turnOff(this);">Home</a>
<a href="#contact"
onMouseOver="turnOn(this);" onMouseOut="turnOff(this);">Contact</a>
<a href="#links"
onMouseOver="turnOn(this);" onMouseOut="turnOff(this);">Links</a>
</body>
</html>You can adapt this script for your own site by changing the ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.