diff --git a/index.html b/index.html
index e29e556..60d49ab 100644
--- a/index.html
+++ b/index.html
@@ -43,8 +43,6 @@
 
                 <label for="denominator">Denominator</label>
                 <input type="number" id="denominator" min="-2147483647" max="2147483647" />
-
-                <button type="button" id="submit">Simplify</button>
             </fieldset>
         </form>
     </section>
@@ -64,7 +62,7 @@
             <a href="https://git.fwdekker.com/FWDekker/simplify-fractions/src/branch/master/LICENSE">MIT License</a>.
             Source code available on <a href="https://git.fwdekker.com/FWDekker/simplify-fractions/">git</a>.
 
-            <div style="float: right;">v1.0.12</div>
+            <div style="float: right;">v1.1.0</div>
         </section>
     </footer>
 </main>
@@ -172,7 +170,6 @@
     doAfterLoad(() => {
         const numeratorInput = $("#numerator");
         const denominatorInput = $("#denominator");
-        const submitButton = $("#submit");
         const outputField = $("#out");
 
 
@@ -180,17 +177,16 @@
          * Returns `undefined` if the inputs are valid, or a tuple consisting of the invalid element and an explanation
          * of its invalidity otherwise.
          *
+         * @param numerator {string} the numerator value
+         * @param denominator {string} the denominator value
          * @returns {(HTMLElement|string)[]|undefined} `undefined` if the inputs are valid, or a tuple consisting of the
          * invalid element and an explanation of its invalidity otherwise
          */
-        const validateInputs = () => {
-            let numerator = numeratorInput.value;
-            let denominator = denominatorInput.value;
-
+        const validateInputs = (numerator, denominator) => {
             if (numerator === "")
-                return [numeratorInput, "Numerator must not be empty."];
+                return [numeratorInput, ""];
             if (denominator === "")
-                return [denominatorInput, "Denominator must not be empty."];
+                return [denominatorInput, ""];
             if (!isInt(numerator))
                 return [numeratorInput, "Numerator must be an integer."];
             if (!isInt(denominator))
@@ -203,13 +199,13 @@
 
         /**
          * Reads the inputs and tries to output the simplified fraction.
-         *
-         * Errors are handled and displayed where appropriate.
          */
         const outputSimplifiedFraction = () => {
-            const validationInfo = validateInputs();
+            let numerator = numeratorInput.value;
+            let denominator = denominatorInput.value;
+
+            const validationInfo = validateInputs(numerator, denominator);
             if (validationInfo !== undefined) {
-                validationInfo[0].select();
                 outputField.innerText = validationInfo[1];
                 return;
             }
@@ -221,25 +217,9 @@
         };
 
 
-        submitButton.onclick = () => outputSimplifiedFraction();
+        numeratorInput.addEventListener("input", () => outputSimplifiedFraction());
 
-        numeratorInput.addEventListener("keydown", event => {
-            if (event.key === "Enter") {
-                if (denominatorInput.value === "") {
-                    denominatorInput.select();
-                } else {
-                    outputSimplifiedFraction();
-                    numeratorInput.select();
-                }
-            }
-        });
-
-        denominatorInput.addEventListener("keydown", event => {
-            if (event.key === "Enter") {
-                outputSimplifiedFraction();
-                denominatorInput.select();
-            }
-        });
+        denominatorInput.addEventListener("input", () => outputSimplifiedFraction());
     });
 </script>
 </body>