diff --git a/dbl.html b/dbl.html
deleted file mode 100644
index 2b82e52..0000000
--- a/dbl.html
+++ /dev/null
@@ -1,15 +0,0 @@
-#!/usr/bin/env js
-
-function dblSize(){
-    var pElements = document.getElementsByTagName("p");
-    if (pElements.length == 0) {
-	alert('p要素が存在しません。');
-    }else{
-	for (let i of pElements){
-	    i.style.fontSize ='200%';
-	}
-    }
-}
-document.addEventListener("DOMContentLoaded",function(e){
-    document.body.addEventListener("click",dblSize);
-});
diff --git a/dbl.js b/dbl.js
new file mode 100644
index 0000000..2b82e52
--- /dev/null
+++ b/dbl.js
@@ -0,0 +1,15 @@
+#!/usr/bin/env js
+
+function dblSize(){
+    var pElements = document.getElementsByTagName("p");
+    if (pElements.length == 0) {
+	alert('p要素が存在しません。');
+    }else{
+	for (let i of pElements){
+	    i.style.fontSize ='200%';
+	}
+    }
+}
+document.addEventListener("DOMContentLoaded",function(e){
+    document.body.addEventListener("click",dblSize);
+});