// 手機端網頁: 處理手機返回鍵
window.onpopstate = function (event) {

    // 監聽到已經按下返回鍵，獲取URL
var url = "" + document.location + "";
var returnDialog = dialog({
        width : 260,
content : '<p class="tc">確定放棄上傳商品？</p>',
okValue : '確定',
cancelValue : '返回',
ok : function(){
            window.history.go(-1
 
);
return true;
},
cancel : function(){
            history.pushState("x-back", null, location.href);
//停留在當前頁面
return true;
}
    });
returnDialog.showModal();
};
// 需要push一筆資料到history
// history.pushState({'page':1}, "title", "XXXXXXXXXXX");
history.pushState("x-back", null, location.href);