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<h1>DHTML JavaScript</h1>
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<p class="intro">JavaScript can create dynamic HTML content:</p>
<p class="intro">Date:
<script type="text/javascript">
document.write(Date());
</script>
</p>
<hr />
<h2>JavaScript Alone<br />
</h2>
<p>If you have studied JavaScript, you already know that the statement:</p>
<p><b>document.write()</b></p>
<p>can be used to display dynamic content to a web page.</p>
<h3>Example</h3>
<p>Using JavaScript to display the current date:</p>
<table width="100%" border="1" class="ex" cellspacing="0" id="table1"><tr><td>
<pre><html>
<body>
<script type="text/javascript">
document.write(Date());
</script>
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<p><a target="_blank" href="tryit.asp@filename=trydhtml_date">Try it Yourself</a></p>
<hr />
<h2>JavaScript and the HTML DOM</h2>
<p>With HTML 4, JavaScript can also be used to change the inner content and
attributes of HTML elements dynamically.</p>
<p>To change the content of an HTML element use:</p>
<p><b>document.getElementById(<i>id</i>).innerHTML</b>=<b><i>new HTML</i></b></p>
<p>To change the attribute of an HTML element use: </p>
<p><b>document.getElementById(<i>id</i>).<i>attribute=new value</i></b></p>
<p>You will learn more about JavaScript and the HTML DOM in the next chapter of
this tutorial.</p>
<hr />
<h2>JavaScript and HTML Events</h2>
<p>New to HTML 4 is the ability to let HTML events trigger actions in the
browser, like starting a JavaScript when a user clicks on an HTML element.</p>
<p>To execute code when a user clicks on an element, use the following event
attribute:</p>
<p><b>onclick=<i>JavaScript</i></b></p>
<p>You will learn more about JavaScript and HTML Events in a later chapter.</p>
<hr />
<h2>JavaScript and CSS</h2>
<p>With HTML 4, JavaScript can also be used to change the style of HTML
elements.</p>
<p>To change the style of an HTML element use:</p>
<p><b>document.getElementById(<i>id</i>).style.<i>property</i></b>=<i><b>new style</b></i></p>
<p>You will learn more about JavaScript and CSS in a later chapter of this
tutorial.</p>
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