javascript for hiding controls

1 files changed, 11 insertions, 6 deletions

diff --git a/GradeBook.js b/GradeBook.js
index 18652c8..4878060 100644
--- a/GradeBook.js
+++ b/GradeBook.js
@@ -1,10 +1,10 @@
-function toggleHTMLClassVisibility(className) {
+function toggleHTMLClassVisibility(className, defaultVisibleStyle) {
 	var x = document.getElementsByClassName(className);
 	var i;
-	var display_style = "block"; // default
+	var display_style = defaultVisibleStyle; // default
 	for (i = 0; i < x.length; i++) {
 		if (x[i].style.display === "none") {
-			display_style = "block";
+			display_style = defaultVisibleStyle;
 		} else {
 			display_style = "none";
 		}
@@ -16,7 +16,7 @@ function toggleHTMLClassVisibility(className) {
 function setHTMLClassVisibility(className, display_style) {
 	// use "block" or "none" for display_style
 	if (display_style === "") {
-		display_style = "block"; // default
+		display_style = ""; // default
 	}
 	var x = document.getElementsByClassName(className);
 	var i;
@@ -28,11 +28,15 @@ function setHTMLClassVisibility(className, display_style) {
 
 
 function toggleHistogramMarker() {
-	toggleHTMLClassVisibility("histogram_marker");
+	toggleHTMLClassVisibility("histogram_marker", "block");
 };
 
 function toggleGradingScheme() {
-	toggleHTMLClassVisibility("grading_scheme");
+	toggleHTMLClassVisibility("grading_scheme", "block");
+};
+
+function toggleControls() {
+	toggleHTMLClassVisibility("controls", "");
 };
 
 // getCookie is copied from https://www.w3schools.com/js/js_cookies.asp
@@ -60,6 +64,7 @@ function readAndSetVisibility(className) {
 function onPageLoad() {
 	readAndSetVisibility("histogram_marker");
 	readAndSetVisibility("grading_scheme");
+	readAndSetVisibility("controls");
 	return "";
 }