update the support of footer countdown

footer.php

@@ -149,6 +149,49 @@
     data-theme="orange">
 </div>
 <style>.skin-menu{left:auto;right:10px;}.changeSkin-gear{left:auto;right:5px;}</style>
+<script>
+    function secondToDate(second) {
+        if (!second) {
+            return 0;
+        }
+        var time = new Array(0, 0, 0, 0, 0);
+        if (second >= 365 * 24 * 3600) {
+            time[0] = parseInt(second / (365 * 24 * 3600));
+            second %= 365 * 24 * 3600;
+        }
+        if (second >= 24 * 3600) {
+            time[1] = parseInt(second / (24 * 3600));
+            second %= 24 * 3600;
+        }
+        if (second >= 3600) {
+            time[2] = parseInt(second / 3600);
+            second %= 3600;
+        }
+        if (second >= 60) {
+            time[3] = parseInt(second / 60);
+            second %= 60;
+        }
+        if (second > 0) {
+            time[4] = second;
+        }
+        return time;
+    }
+</script>
+<script type="text/javascript" language="javascript">
+    function setTime() {
+        // 博客创建时间秒数，时间格式中，月比较特殊，是从0开始的，所以想要显示5月，得写4才行，如下
+        var create_time = Math.round(new Date(Date.UTC(2018, 6, 03, 14, 30, 0))
+                .getTime() / 1000);
+        // 当前时间秒数,增加时区的差异
+        var timestamp = Math.round((new Date().getTime() + 8 * 60 * 60 * 1000) / 1000);
+        currentTime = secondToDate((timestamp - create_time));
+        currentTimeHtml = currentTime[0] + '年' + currentTime[1] + '天'
+                + currentTime[2] + '时' + currentTime[3] + '分' + currentTime[4]
+                + '秒';
+        document.getElementById("htmer_time").innerHTML = currentTimeHtml;
+    }
+    setInterval(setTime, 1000);
+</script>
 <?php endif; ?>
 </body>
 </html>