<?xml version="1.0"?>
<tabbar>
    <row>
        <tab id="a1" width='200px'>Tab 1-1</tab>
        <tab id="a2" width='200px'>Tab 1-2</tab>

        <tab id="b1" width='150px'>Tab 2-1</tab>
        <tab id="b2" width='100px' selected="1">Tab 2-2</tab>
        <tab id="b3" width='150px'>Tab 2-3</tab>
    </row>
</tabbar>