diff --git a/javascript/hires_fix.js b/javascript/hires_fix.js
index 0629475f..ba175301 100644
--- a/javascript/hires_fix.js
+++ b/javascript/hires_fix.js
@@ -1,13 +1,9 @@
 
-function setInactive(elem, inactive){
-    if(inactive){
-        elem.classList.add('inactive')
-    } else{
-        elem.classList.remove('inactive')
-    }
-}
-
 function onCalcResolutionHires(enable, width, height, hr_scale, hr_resize_x, hr_resize_y){
+    function setInactive(elem, inactive){
+        elem.classList.toggle('inactive', !!inactive)
+    }
+
     hrUpscaleBy = gradioApp().getElementById('txt2img_hr_scale')
     hrResizeX = gradioApp().getElementById('txt2img_hr_resize_x')
     hrResizeY = gradioApp().getElementById('txt2img_hr_resize_y')
diff --git a/javascript/imageviewer.js b/javascript/imageviewer.js
index 3deffa9b..f364a2a1 100644
--- a/javascript/imageviewer.js
+++ b/javascript/imageviewer.js
@@ -144,11 +144,7 @@ function setupImageForLightbox(e) {
 }
 
 function modalZoomSet(modalImage, enable) {
-    if (enable) {
-        modalImage.classList.add('modalImageFullscreen');
-    } else {
-        modalImage.classList.remove('modalImageFullscreen');
-    }
+    if(modalImage) modalImage.classList.toggle('modalImageFullscreen', !!enable);
 }
 
 function modalZoomToggle(event) {