function transDate() {

        var $time =document.getElementById("share-time");

        var date = $time.innerHTML.trim();

        var tt = new Date(parseInt(date));

        var days = parseInt((new Date().getTime() - date) / 86400000);

        var today = new Date().getDate();

        var year = tt.getFullYear();

        var mouth = tt.getMonth() + 1;

        var day = tt.getDate();

        var time = tt.getHours() < 10 ? "0" + tt.getHours() : tt.getHours();

        var min = tt.getMinutes() < 10 ? "0" + tt.getMinutes() : tt.getMinutes();

        var result, offset;
　　　　　　　offset = Math.abs(today - day);
　　　　if (days < 4&&offset<4) {
　　　　　　　if (offset === 0) {

                result = "今天" + time + ":" + min;

            } else if (offset === 1) {

                result = "昨天" + time + ":" + min;

            } else if (offset === 2) {

                result = "前天" + time + ":" + min;

            }

        } else {

            result = year + "-" + mouth + "-" + day + " " + time + ":" + min;

        }

        $time.innerHTML = result;

    }

    transDate();