tabbar1=new dhtmlXTabBar("a_tabbar","bottom");
    tabbar1.setAlign("left");
    ...

 
    tabbar2=new dhtmlXTabBar("a_tabbar","bottom");
    tabbar2.setAlign("right");

 
    tabbar3=new dhtmlXTabBar("a_tabbar","bottom");
    tabbar3.setAlign("left");

 
    tabbar4=new dhtmlXTabBar("a_tabbar","bottom");
    tabbar4.setAlign("right");