Js 判斷頁面是第一次加載

爲自己保存一份源碼..轉載地址不詳...

<script type="text/javascript" language="javascript">
                window.onload = function () {
                    var ck = new Cookie("HasLoaded");  //每個頁面的new Cookie名HasLoaded不能相同
                    if (ck.Read() == null) {//未加載過，Cookie內容爲空
                        alert("首次打開頁面");
                        var dd = new Date();
                        dd = new Date(dd.getYear() + 1900, dd.getMonth(), dd.getDate());
                        dd.setDate(dd.getDate() + 365);
                        ck.setExpiresTime(dd);
                        ck.Write("true");  //設置Cookie。只要IE不關閉，Cookie就一直存在
                    }
                    else {
                        alert("頁面刷新");
                    }
                }
</script>