ID's from EL

Can anyone please tell me why I can't set the id for a command component, like <h:commandButton> or <h:commandLink> from an EL, for example:

<h:commandButton id="id_#{somebean.value}" />

while for <h:selectBooleanCheckbox> it works?

<h:selectBooleanCheckbox id="id_#{somebean.value}" />

[394 byte] By [alexda] at [2007-11-26 15:31:24]