Extjs 双击关闭tab页

var tab = new Ext.TabPanel({
region:'center',
deferredRender:false,
activeTab:0,
resizeTabs:true, // turn on tab resizing
minTabWidth: 115,
tabWidth:135,
enableTabScroll:true,
//双击关闭tab页
initEvents: function() {
Ext.TabPanel.superclass.initEvents.call(this);
this.mon(this.strip, 'mousedown', this.onStripMouseDown, this);
//ADD:monitor title dbclick
this.mon(this.strip, 'dblclick', this.onTitleDbClick, this);
},
//ADD: handler 双击关闭tab页
onTitleDbClick: function(e, target, o) {
var t = this.findTargets(e);
if (t.item.fireEvent('beforeclose', t.item) !== false) {
t.item.fireEvent('close', t.item);
this.remove(t.item);
}
}
});