<div id="a_tabbar" style="width:400;height:100"></div>
<script>
 
            tabbar=new dhtmlXTabBar("a_tabbar","top");
            tabbar.setImagePath("../../codebase/imgs/");
            
            tabbar.loadXML("tabs_xml.xml");
            // or
            tabbar.loadXMLString(varString);</script>
            ---------tabs.xml---------
<?xml version="1.0"?>
<tabbar align="left" offset="20" margin="-10" tabstyle="silver" skinColors="#ffffff">
    <row>
        <tab id="a1" width='200px'>Tab 1-1</tab>
        <tab id="a2" width='200px'>Tab 1-2</tab>
    </row>
    <row>
        <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>