extjs - Horizontal Scroll bar to the Toolbar of the Tab Panel -


i have tabpanel addning dynamically tabs. when number of tabs increase become small . can have scrollbar toolbar of tab panel ? tab panel code : 

 var centerpanel = new ext.tabpanel({                         region: 'center',                         deferredrender: false,                         activetab: 0,                         autoscroll: true,                         items: [                         <if starturl != "">                             {                                 title: "${startname}",                                 html: "<iframe src='${starturl}'  width='100%' height='100%' id='frame_${startname}' frameborder=0 name='name'/>"                             }                         </if>                         ]  });

try set "mintabwidth" property of new tabs. default value 30 (px). set "autoscroll" of tabpanel true.


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