Help in generating fixed number of link in pagination

[Carlog]

Hi, my pagination works good but I'm not able to understand how generate a fixed number of links to the pages.
For example, I need to have 5 fixed links in this way: 1 - 2 - 3 - 4 - 5 >
if I click on the third page I will see always 5 links: < 3 - 4 - 5 - 6 -7 >

Now with my algorithm I'm only able to generate all the links, but I have no idea how create what I have explained above.
This is my code(only for href generation):

<div class="pageBoxRight">
    	<c:if test="${param.pageNumber > 1}">
    	<a href="javascript: previousRecords();" class="previous"><em>previous</em></a>
    	</c:if>
    	<c:forEach var="i" begin="1" end="${tot + 1}" step="1" varStatus ="status">
    	<a href="javascript: goToPage(${i});" id="paginator${i}" class="pageNumber"><span class="pageNumberRight">${i}</span></a>
    	</c:forEach>
    	<c:if test="${param.pageNumber < tot}">
    	<a href="javascript: nextRecords();" class="next"><em>next</em></a>
    	</c:if>
    </div>

Can someone help me? Thanks a lot.