Update flask

@@ -17,7 +17,7 @@ function load_cascade()
     let faceCascadeURL = 'static/js/haarcascade_frontalface_default.xml'
     let utils = new Utils('errorMessage');	
     utils.createFileFromUrl(faceCascadeFile, faceCascadeURL, () => {
-        activate()
+        activate();
     });
 }
 function activate()
@@ -81,7 +81,7 @@ function submit()
 			   alert("등록 성공");
 		   }
 		   else{
-			   alert("등록 실패")
+			   alert("등록 실패");
 		   }
 	   }
 	})
@@ -90,10 +90,10 @@ function submit()
 var loadFile = function(event) {
     var reader = new FileReader();
     reader.readAsDataURL(event.target.files[0]);
-    output.onload = function() {
+    reader.onload = function() {
 		var output = document.getElementById('imagefile');
 		output.src = URL.createObjectURL(event.target.files[0]);
-		detect_face()
+		detect_face();
     }
   };