hi guys, I need help with this (im a total noob when it comes to jquery)
Basically, what I want is that when a user clicks on the link, the image changes


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="description" content="Een eenvoudige imageviewer gemaakt met JavaScript" />
<meta name="author" content="Mio van der Lijn" />
<title>Een eenvoudige image viewer</title>
<link rel="stylesheet" href="default.css" type="text/css" media="screen" />
<style type="text/css">
img {
overflow: hidden;
}

/</style>

<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>

<script type="text/javascript">
$(document).on("ready", showPic);
function showPic(whichpic){
var source = whichpic.GetAttribute("href");
var imageholder = document.getElementById("imageholder");
imageholder.setAttribute("src",source);
}
</script>
</head>
<body>
<ul>
<li><a href="een.png" id="link1" onclick="showPic(this);return:false;" title="een jaar">een</a></li>
<li><a href="twee.jpg" id="link2" onclick="showPic(this);return:false;" title="twee ringen">twee</a></li>
<li><a href="drie.jpg" id="link3" onclick="showPic(this);return:false;" title="drie kersen">drie</a></li>
</ul>
<p><img id="imageholder" src="#" width="400" height="300" alt="" /></p>
<p id="caption"></p>
</body>
</html>


thank you