diff --git a/templates/tag.html b/templates/tag.html
index 6a7d031..f859062 100644
--- a/templates/tag.html
+++ b/templates/tag.html
@@ -69,6 +69,7 @@ document.getElementById("{{ blogBase['singeListJson'][num]['postTitle'] }}").set
 {%- endfor %}
 
 tagList=[];
+jsonData='';
 let requestJson="blogBase.json"
 let request=new XMLHttpRequest();
 request.open("GET",requestJson);
@@ -77,10 +78,10 @@ request.send();
 request.onload=function(){
     jsonData=JSON.parse(request.response);
     console.log(jsonData);
-    showList(jsonData,window.location.hash.slice(1));
+    showList(window.location.hash.slice(1));
 }
 
-function showList(jsonData,tag){
+function showList(tag){
     let SideNav=document.getElementsByClassName("SideNav")[0];
     let tagLable=document.getElementById("tagLable");
     for(i in jsonData["postListJson"]){
@@ -140,9 +141,9 @@ function showList(jsonData,tag){
 function updateShowTag(label){
     if(window.location.hash.slice(1)!=encodeURI(label)){
         window.location.hash="#"+(label);
-        showList(jsonData,label);
+        showList(label);
+        console.log("change to "+label);
     }
-
 }
 
 </script>