diff --git a/timer.js b/timer.js
index 2e98d25..050717f 100644
--- a/timer.js
+++ b/timer.js
@@ -30,7 +30,7 @@
     function stopCountDown() {
         clearTimeout(tmID);
         infobox.innerHTML = "成功!";
-        document.body.style.background = "98fb98";
+        document.body.style.background = "#98fb98";
         infobox.setAttribute("class", "success");
     }
     button.addEventListener("click", startCountDown, false);