var tabs = new Ext.TabPanel({
        renderTo: 'tabs1',tabCls:'bbbbbbbbbbbbbbbbbbbbb',
        width:450,
        activeTab: 0,
        frame:true,
        defaults:{autoHeight: true},
        items:[
            {contentEl:'script', title: 'Short Text'},
            {contentEl:'markup', title: 'Long Text'}
        ]
    });
////////////
    for(var i=0;i<tabs.initialConfig.items.length;i++)
     Ext.get(tabs.getTabEl(i)).on('mouseover',function(){alert('mouseover'+this.dom.innerHTML)});//this为tab标签的ext对象