Hurray,
Zuenf,
Вариант с css и без ...
<!doctype html>
<html>
<head>
<title>StepTest</title>
<style type="text/css">
[id*=step]:nth-of-type(n+4){
background-color: #00FF00;
}
</style>
<script src="http://code.jquery.com/jquery-latest.js"></script>
<script>
$(function(){
//id
$('[id*=step]:gt(2)').css('color', 'red');
;
//class
$('.step:gt(2)').css('color', 'red');
});
</script>
</head>
<body>
id:<br>
<div id="step1">test1</div>
<div id="step2">test2</div>
<div id="step3">test3</div>
<div id="step4">test4</div>
<div id="step5">test5</div>
<div id="step6">test6</div>
<br>
class:<br>
<div class="step">test1</div>
<div class="step">test2</div>
<div class="step">test3</div>
<div class="step">test4</div>
<div class="step">test5</div>
<div class="step">test6</div>
</body>
</html>