unarmed_javascript/day7.1.html at master · gleddy/unarmed_javascript · GitHub

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<!DOCTYPE HTML>
<html>
<head>
<title>7.1</title>
<style type="text/css" media="screen">
	.indent { text-indent: 20px; }
</style>
<script type="text/javascript" charset="utf-8">

var indentPara = function() {
	var para = document.getElementsByTagName('p');
	var trigger = document.getElementById('trigger');
	trigger.onclick = function() {
		for (var i=0; i < para.length; i++) {
			para[i].className = "indent";
		};
	}
}

window.onload = indentPara;

</script>
</head>
<body class="wrap">

<button id="trigger">click me</button>

<p>This is the first paragraph, you should indent me.</p>
<p>This is the second paragraph, you should indent me.</p>
<p>This is the third paragraph, you should indent me.</p>

</body>
</html>