Update

cgi-bin/vorbereitung/apiajax.html

@@ -7,7 +7,7 @@
         <form>
                 <label for="laufzeit">Dauer einer Schnensch Aktion</label>
                 <input id="laufzeit" type="number"></input>
-                <button id="calc" onclick="calc" type="button" value="Calculate!"></button>
+                <button id="calc" click="calc" type="button" value="Calculate!"></button>
         </form>
         <h1 id="lensch"></h1>
 
@@ -23,6 +23,7 @@
 
                         req.onreadystatechange = function () {
                                 if (this.readyState === 4 && this.status === 200) {
+                                        console.log(this.responseText);
                                         lensch.value = this.responseText;
                                 }
                         }