对象深度克隆

function deepClone (target,origin) {
    var target = target || {};
    for (props in origin) {
        if (origin.hasOwnProperty(props)) {
            if ( typeof origin[props] === 'object') {
                target[props] = origin[props] instanceof Array ? [] : {}
                deepClone(target[props],origin[props])
            } else {
                target[props] = origin[props]
            }
        }
    }
    return target;
}