Fix button generator

static/anatomy-quiz.html

@@ -9,7 +9,7 @@
     <input id="num-questions" type="number" value="15" />
   </div>
   <hr />
-  <button onClick="generate_quiz">Generate!</button>
+  <button id="generator">Generate!</button>
   <hr />
   <h2>Quiz</h2>
   <ul id="quiz-terms"></ul>
@@ -183,6 +183,8 @@
     const terms_list = document.getElementById("quiz-terms");
 
     function generate_quiz() {
+      terms_list.innerHTML = "";
+
       let weights = [];
       let types = [];
 
@@ -556,6 +558,10 @@
       "Iliopsoas"
     ];
 
+    document
+      .getElementById("generator")
+      .addEventListener("click", generate_quiz);
+
     generate_quiz();
   </script>
 </body>