ExtJs 提供的 javascript克隆对象的步骤

/**
?*?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?Sakálo?
?*/
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?