修改了错别字，并且增设了更多调试点

js/main.js

@@ -5,20 +5,22 @@ window.onload = function(){
 // 如果网页失去焦点，则改变标题 -- Writtrn By Copilot
 window.onblur = function(){
     oldTitle = document.title;
-    playchecker = setInterval(playstatChecking, 1000);
-    if(!document.getElementById("Player").paused){
-        changeTitle("playing");
-    }else if(nowplaying.songname != "" && nowplaying.artist != ""){
-        changeTitle("nowplaying");
-    }else{
-        //document.title = `[Pause]`;
-    }
+    bgplayChecker = setInterval(playstatChecking, 3000);
+    console.warn("Page checker started");
+    // if(!document.getElementById("Player").paused){
+    //     changeTitle("playing");
+    // }else if(nowplaying.songname != "" && nowplaying.artist != ""){
+    //     changeTitle("nowplaying");
+    // }else{
+    //     //document.title = `[Pause]`;
+    // }
 }
 
 // 如果网页获得焦点，则改变标题 -- Writtrn By Copilot
 window.onfocus = function(){
+    clearInterval(bgplayChecker);
+    console.warn("Page checker stopped");
     changeTitle();
-    clearInterval(playChecker);
 }
 
 nowplaying = {
@@ -27,7 +29,7 @@ nowplaying = {
     "artist": ""
 };
 oldTitle = document.title;
-var playChecker;
+var bgplayChecker;
 var listPlayChecker;
 
 // 搜索音乐
@@ -147,9 +149,9 @@ function addlist(songid, songname, artist){
 // 播放下一首
 function playnext(){
     clearInterval(listPlayChecker);
-    console.warn("Checker Already Cleared.")
+    console.warn("Checker Already Cleared. pn")
     listPlayChecker = setInterval(checkplay, 3000);
-    console.warn("Checker Already Set.")
+    console.warn("Checker Already Set. pn")
     if(list.isEmpty()){
         console.log("音乐列表已经播放完毕了哦，快加入新的音乐吧~");
         alert("音乐列表已经播放完毕了哦，快加入新的音乐吧~");
@@ -162,6 +164,7 @@ function playnext(){
 // 检测是否播放完毕
 function checkplay(){
     // 为了防止播放列表结束以后一直调用playnext产生过多的alart，所以需要检测播放列表是否为空
+    console.warn("Checking now play")
     if(!list.isEmpty()){
         if(document.getElementById("Player").ended){
             // 播放完毕后自动播放下一首
@@ -170,16 +173,16 @@ function checkplay(){
     }else{
         //clearInterval(checkplay);
         clearInterval(listPlayChecker);
-        console.warn("Checker Already Cleared.")
+        console.warn("Checker Already Cleared. cp")
     }
 }
 
 // 播放列表
 function playthelist(){
     clearInterval(listPlayChecker);
-    console.warn("Checker Already Cleared.")
+    console.warn("Checker Already Cleared. ptl")
     listPlayChecker = setInterval(checkplay, 3000);
-    console.warn("Checker Already Set.")
+    console.warn("Checker Already Set. ptl")
     if(list.isEmpty()){
         console.log("音乐列表没有歌曲哦，快加入新的音乐吧~");
         alert("音乐列表没有歌曲哦，快加入新的音乐吧~");
@@ -277,6 +280,7 @@ function removehistory(){
 // }
 
 function changeTitle(status){
+    console.log(status + " title changed");
     switch(status){
         case "playing":
             document.title = `[Now Playing] ${nowplaying.songname} - ${nowplaying.artist}`;
@@ -293,7 +297,7 @@ function changeTitle(status){
 }
 
 function playstatChecking(){
-    // console.log("playstatChecking");
+    console.log("playstatChecking");
     var audio = document.getElementById("Player");
     if (audio.paused) {
         // 暂停