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jQuery: Select random nth element

Posted on 2013-11-04
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Last Modified: 2013-11-04
How can I select a random matching element?
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta charset="utf-8" />
<title>Demo</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {
 $('p:eq(rand)').css('border','2px solid red');
});
</script>
</head>
<body>
<p>0</p>
<p>1</p>
<p>2</p>
<p>3</p>
<p>4</p>
<p>5</p>
</body>
</html>

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Question by:hankknight
1 Comment
 
LVL 82

Accepted Solution

by:
leakim971 earned 500 total points
Comment Utility
Test page : http://jsfiddle.net/Ny5TV/

$(document).ready(function() {
 var rand = parseInt(Math.random() * $('p').length);
 $('p:eq(' + rand + ')').css('border','2px solid red');
});

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