<html>
<head>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.5.1/jquery.min.js"></script>
<script type="text/javascript" language="javascript">
$(function() {
$('.but_go').click(function(){
$(this).siblings().each(function() {
alert($(this).val());
});
});
});
</script>
</head>
<body>
<div>
<input type="text" value="" class="elem2" />
<input type="text" value="" class="prname" />
<input type="button" value="go" class="but_go" />
</div>
</body>
</html>