js implemented method of the Object clone (clone depth)

function deepClone(origin, target){
    var target = target || {},
    toStr = Object.prototype.toString,
    arrStr = "[object Array]";
    for(var prop in origin){
        if(origin.hasOwnProperty(prop)){
            if(origin[prop] !== "null" && typeof(origin[prop]) == "object"{
            target[prop] = (toStr.call(origin[prop]) == arrStr) ? [] : {};                    
                deepClone(origin[prop],target[prop]);
        　　}else{
            　　target[prop] = origin[prop]
        　　}
        }
    }
}