diff --git a/40/40.html b/40/40.html
new file mode 100644
index 0000000..0c053ed
--- /dev/null
+++ b/40/40.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html>
+  <head>
+  <script>
+function validator(){
+  if(document.buckyForm.thebox.checked){
+    alert("Yes its checked!");
+  } else {
+    alert("No its not checked!");
+  }
+}
+  </script>
+  </head>
+  <body>
+    <form name="buckyForm">
+      <label for="thebox">The box</label>
+      <input id="thebox" type="checkbox" name="thebox"/>
+      <input type="button" value="Press me!" onClick="validator();"/>
+    </form>
+  </body>
+</html>
