1 files changed, 12 insertions, 0 deletions
diff --git a/modules/zelfoverhoor/docent.js b/modules/zelfoverhoor/docent.js
index 388c7f7..c14fb2e 100644
--- a/modules/zelfoverhoor/docent.js
+++ b/modules/zelfoverhoor/docent.js
@@ -5,8 +5,18 @@ window.addEventListener("error",function(err){
 	xhr.send(str);
 });
 
+window.onbeforeunload=function(ev){
+	if(editorIsOpen){
+		var text="Je bent momenteel een vragenset aan het bewerken; weet je zeker dat je het window wilt sluiten?";
+		ev.returnValue=text;
+		return text;
+	}
+	return undefined;
+};
+
 var questionsets=null;
 var currentlyEditing=null;
+var editorIsOpen=false;
 
 function getQuestionSets(){
 	var xhr=new XMLHttpRequest();
@@ -107,6 +117,7 @@ function openBlankSetEditor(){
 	document.getElementById("newqsetform").classList.remove("invisible");
 	document.getElementById("newqsetvisible").classList.add("invisible");
 	currentlyEditing=null;
+	editorIsOpen=true;
 }
 
 function doNewQSet(){
@@ -157,6 +168,7 @@ function closeQSetForm(){
 	document.getElementById("newqsetform").classList.add("invisible");
 	document.getElementById("newqsetvisible").classList.remove("invisible");
 	currentlyEditing=null;
+	editorIsOpen=false;
 }
 
 function renumberQuestions(){