appending page break to <select> element

appending page break to <select> element

Hi,
 
I would like to dynamically insert a <br /> after each </select> (like createElement).  I am told that this is simple with jquery but only have limited experience in this area.  Can somebody please give me advice on this. 
 
code:
<html>
<head></head>
<body>
<form>
<select>
<option>1</option>
<option>2</option>
</select>
                   <--- dynamically insert <br /> here
<select>
<option>3</option>
<option>4</option>
</select>
                   <--- dynamically insert <br /> here
 
</form>
 
<body>
</html>
Thanks,
 
Nick