<a4j:commandButton id="edit_button" reRender="edit_content" action="#{usersBean.reset}" value="Show popup" oncomplete="javascript:Richfaces.showModalPanel('form:edit_panel');">
            </a4j:commandButton>

<rich:modalPanel id="edit_panel" width="400" height="300" >
    <h:panelGrid columns="2" id="edit_content">
        <h:outputLabel for="ed_name">
            <h:outputText value="Name"/>
        </h:outputLabel>
        <h:inputText id="ed_name" value="#{usersBean.editingUser.name}">
            <f:validateLength minimum="1" maximum="25"/>
        </h:inputText>

        <h:outputLabel for="ed_lastname">
            <h:outputText value="Lastname"/>
        </h:outputLabel>
        <h:inputText id="ed_lastname" value="#{usersBean.editingUser.lastname}">
            <f:validateLength minimum="1" maximum="25"/>
        </h:inputText>

        <h:outputLabel for="ed_inn">
            <h:outputText value="INN"/>
        </h:outputLabel>
        <h:inputText id="ed_inn" value="#{usersBean.editingUser.inn}"/>

        <a4j:commandButton id="save_button" reRender="table" action="#{usersBean.save}" value="Save"
                           onclick="javascript:Richfaces.hideModalPanel('form:edit_panel');"/>
        <a4j:commandButton id="ed_cbutton" onclick="javascript:Richfaces.hideModalPanel('form:edit_panel');"
                           value="Cancel"/>
    </h:panelGrid>
</rich:modalPanel>