diff --git a/js/libmain.js b/js/libmain.js
index 2686a8a..652c55b 100644
--- a/js/libmain.js
+++ b/js/libmain.js
@@ -25,16 +25,15 @@
     // set up main canvas element
     main_stage.mainframe=document.getElementById("mainframe");
     main_stage.canvas=document.getElementById("maincanvas");
-    if(main_stage.mainframe===null) {
+    if(main_stage.mainframe==null) {
         main_stage.mainframe=document.createElement("div");
         main_stage.mainframe.id="mainframe";
         document.body.appendChild(main_stage.mainframe);
     }
     main_stage.mainframe.style.display="inline-block";
-    main_stage.mainframe.style.display="inline-block";
     main_stage.mainframe.style.zIndex=0;
     main_stage.mainframe.style.backgroundColor="#000000";
-    if(main_stage.canvas===null) {
+    if(main_stage.canvas==null) {
         main_stage.canvas=document.createElement("canvas");
         main_stage.canvas.id="maincanvas";
         main_stage.mainframe.appendChild(main_stage.canvas);