<MAP_popup>
        <reference name="head">
            <action method="addItem" ifconfig="sales/msrp/enabled"><type>skin_js</type><name>js/msrp.js</name></action>
        </reference>
        <reference name="content">
            <block type="core/template" template="catalog/msrp/popup.phtml" name="product.tooltip"/>
        </reference>
    </MAP_popup>