diff --git a/change.js b/change.js
index fd19ec4..f17798a 100644
--- a/change.js
+++ b/change.js
@@ -1,18 +1,24 @@
 document.addEventListener("DOMContentLoaded", () => {
     var head = document.querySelector("head");
     var newcss;
-
+    let cssbtn1 = document.getElementById("css1");
     let cssbtn2 = document.getElementById("css2");
     let cssbtn3 = document.getElementById("css3");
-    let unlbtn = document.getElementById("unl");
     
-    unlbtn.addEventListener("click", (e) => {
-        if (newcss) {
+    //function bg1(){
+    cssbtn1.addEventListener("click", (e) => {  
+	if (newcss) return;
+	newcss = document.createElement("link");
+	newcss.rel = "stylesheet";
+	newcss.href = "new1.css";
+	head.appendChild(newcss);	// link要素を追加
+    });
+    /*if(bg2 && bg3){
             newcss.remove();
             newcss = null;
-        }
-    }); 
-
+    }*/
+//}
+    //function bg2(){
     cssbtn2.addEventListener("click", (e) => {  
         if (newcss) return;
         newcss = document.createElement("link");
@@ -39,4 +45,11 @@
                     newcss = null;
             }*/
         //}
+        let unlbtn = document.getElementById("unl");
+        unlbtn.addEventListener("click", (e) => {
+            if (newcss) {
+                newcss.remove();
+                newcss = null;
+            }
+        }); 
 });
diff --git a/index.html b/index.html
index 11ec58f..e1a0263 100644
--- a/index.html
+++ b/index.html
@@ -119,7 +119,10 @@
         <div class="menu-content">
             <ul>
                 <li>
-                    <p><button type="button" id="unl" class="bg-change">背景１</button></p>
+                    <p><button type="button" id="unl" class="bg-change">アンロード</button></p>
+                </li>
+                <li>
+                    <p><button type="button" id="css1" class="bg-change">背景1</button></p>
                 </li>
                 <li>
                     <p><button type="button" id="css2" class="bg-change">背景2</button></p>
diff --git a/jstrr.css b/jstrr.css
index 7f7c60b..1608d2b 100644
--- a/jstrr.css
+++ b/jstrr.css
@@ -1,6 +1,6 @@
 body {
-  background-color: rgb(241,89,30);
-    background-image: url(jstrr1.png);
+    background-color: rgb(241,89,30);
+    background-image: url(xmas.png);
     background-position: center;
     background-repeat: no-repeat;
     background-size: cover;