//克隆一
function cloneObj(obj) {
    var str, newobj = obj.constructor === Array ? [] : {};
    if (typeof obj !== 'object') {
        return;
    } else if (window.JSON) {
        str = JSON.stringify(obj), //序列化物件
        newobj = JSON.parse(str); //還原
    } else {
        for (var i in obj) {
            newobj[i] = typeof obj[i] === 'object' ? cloneObj(obj[i]) : obj[i];
        }
    }
    return newobj;
};

//克隆二
function deepClone(obj){
    var result,oClass=isClass(obj);
    //確定result的型別
    if(oClass==="Object"){
        result={};
    }else if(oClass==="Array"){
        result=[];
    }else{
        return obj;
    }
    for(key in obj){
        var copy=obj[key];
        if(isClass(copy)=="Object"){
            result[key]=arguments.callee(copy);//遞迴呼叫
        }else if(isClass(copy)=="Array"){
            result[key]=arguments.callee(copy);
        }else{
            result[key]=obj[key];
        }
    }
    return result;
}
//返回傳遞給他的任意物件的類
function isClass(o){
    if(o===null) return "Null";
    if(o===undefined) return "Undefined";
    return Object.prototype.toString.call(o).slice(8,-1);
}

//sleep函式
function sleep(numberMillis) {
    var now = new Date();
    var exitTime = now.getTime() + numberMillis;
    while (true) {
        now = new Date();
        if (now.getTime() > exitTime)
            return;
    }
}