对于scope使用的几个小技巧：
Four Tips for Staying on Track With Scope in ExtJS
如何在ExtJS(Javascript)里面拷贝(克隆）一个Object
对于ExtJS可以使用这段代码：
/**
* Clone Function
* @param {Object/Array} o Object or array to clone
* @return {Object/Array} Deep clone of an object or an array
* @author Ing. Jozef Sakáloš
*/
Ext.ux.util.clone = function(o) {
if(!o || 'object' !== typeof o) {
return o;
}
if('function' === typeof o.clone) {
return o.clone();
}
var c = '[object Array]' === Object.prototype.toString.call(o) ? [] : {};
var p, v;
for(p in o) {
if(o.hasOwnProperty(p)) {
v = o[p];
if(v && 'object' === typeof v) {
c[p] = Ext.ux.util.clone(v);
}
else {
c[p] = v;
}
}
}
return c;
}; // eo function clone
原始网页：http://www.extjs.com/forum/showthread.php?t=26644
ExtJS自定义事件冒泡：
参考链接：DOM-like event bubbling on [component].ownerCt http://www.extjs.com/forum/showthread.php?t=30569
Ext.ux.BroadcastEvents -application level events (aka broadcasting) v0.5
