diff --git a/WebIDE/enhance.user.js b/WebIDE/enhance.user.js
index eedc798..e8befd4 100644
--- a/WebIDE/enhance.user.js
+++ b/WebIDE/enhance.user.js
@@ -18,7 +18,7 @@
             clearInterval(id);
         }
     }, 300)
-	document.onkeydown = function() {
+    document.onkeydown = function() {
         var e = window.event;
         if (e.keyCode == 87 && e.altKey) {
             var activeTab = document.getElementsByClassName('tab-label active')[0];