diff --git a/libiary/Download_CCTV_Video.js b/libiary/Download_CCTV_Video.js
index 7aa5b34..ec828d5 100755
--- a/libiary/Download_CCTV_Video.js
+++ b/libiary/Download_CCTV_Video.js
@@ -28,7 +28,7 @@
      */
     function appendDownloadEle(videoJQ, title, videoSrc) {
         let downloadIdAttrName = videoJQ.attr("id") + "_download";
-        var downloading=false
+        var downloading = false
         console.log(downloadIdAttrName)
         if ($("#" + downloadIdAttrName).length <= 0) {
             // 【下载】按钮
@@ -54,12 +54,12 @@
             // 为下载按钮绑定单击事件下载视频
             downloadJQ.on("click", function (event) {
                 // console.log("下载视频：" + $(this).attr("id") + ", href=" +  $(this).attr("href"));
-  
-                if(downloading==true){
-                console.log("视频下载中，请勿再次点击")
+
+                if (downloading == true) {
+                    console.log("视频下载中，请勿再次点击")
                     return false;
-                }else{
-                  downloading=true
+                } else {
+                    downloading = true
                 }
                 // 阻止 a 标签默认行为
                 event.preventDefault();
@@ -72,21 +72,22 @@
                     xhr.open('GET', downloadUrl, true);
                     xhr.responseType = 'blob';
 
-                     xhr.onreadystatechange = function(){
-                console.log("READYSTATE"+ xhr.readyState);
-                if(this.status == 200 && this.readyState == 4){
-                        const downloadLink = document.createElement('a');
+                    xhr.onreadystatechange = function () {
+                        console.log("READYSTATE" + xhr.readyState);
+                        if (this.status == 200 && this.readyState == 4) {
+                            const downloadLink = document.createElement('a');
                             downloadLink.href = window.URL.createObjectURL(new Blob([xhr.response]));
                             downloadLink.download = title + '.mp4';
                             document.body.appendChild(downloadLink);
                             downloadLink.click();
                             downloadLink.remove();
-                    downloading=false;
-                }else if(this.status == 404){
-                    console.log("视频不存在");
-                }
+                            downloading = false;
+                        } else if (this.status == 404) {
+                            console.log("视频不存在");
+                            downloading = false;
+                        }
 
-            }
+                    }
 
                     xhr.onprogress = (event) => {
                         if (event.lengthComputable) {
@@ -97,6 +98,7 @@
                     }
                     xhr.onerror = () => {
                         console.error('网络或服务器错误');
+                        downloading = false;
                     }
 
                     xhr.send();