EL : How do I insert a dynamic value in an expression ?

Hi,
Here's my code -
<c:forEach items="languageCodes" var="aCode">
<c:if test="${myMap.aCode} != null" >
doSomething
</c:if>
</c:forEach>
I need ${myMap.aCode} to work as if it was ${myMap.${aCode}}, invoking myMap's getter with the current value of the variable aCode, instead of myMap.get("aCode") with aCode as a String.
Any thoughts on this would be very much appreciated.

Should anyone stumbles into the same issue, the solution is pretty simple -
<c:set var="headerName" value="host"/>
${header[headerName]}
It's an excerpt from a very nice tutorial, over here -
http://java.sun.com/developer/EJTechTips/2004/tt0126.html
Balus, it's Your attitude that you may wanna [edit]. As soon as you grow up.

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if hlped pls mark points

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EL : How do I insert a dynamic value in an expression ?

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