diff --git a/index.html b/index.html
index 7728ce6..f849867 100644
--- a/index.html
+++ b/index.html
@@ -41,7 +41,7 @@
       .parent {
         display: grid;
         grid-template-columns: repeat(2, 1fr);
-        grid-template-rows: repeat(3, 1fr);
+        grid-template-rows: repeat(2, 1fr);
         grid-column-gap: 0px;
         grid-row-gap: 0px;
       }
@@ -50,64 +50,16 @@
 <body>
   <div style="width: fit-content; font-size: small">
     <fieldset>
-      <legend>Theme:</legend> <input type="radio" id="slm" name="theme" style="margin-top: -1px; vertical-align: middle" onclick="setLightMode();" checked> <label for="slm">Light</label> <input type="radio" id="sdm" name="theme" style="margin-top: -1px; vertical-align: middle" onclick="setDarkMode();"> <label for="sdm">Dark</label>
+      <legend>Theme:</legend> <input type="radio" id="slm" name="theme" style="margin-top: -1px; vertical-align: middle" onclick="setLightMode()" checked> <label for="slm">Light</label> <input type="radio" id="sdm" name="theme" style="margin-top: -1px; vertical-align: middle" onclick="setDarkMode()"> <label for="sdm">Dark</label>
     </fieldset>
   </div>
   <div class="parent">
-    <div lang="en">
-      <h3>Simple percentage calculator:</h3>
-      <table id="table_a">
-        <tr>
-          <td style="width: 175px"><label>Start value:</label></td>
-          <td colspan="3"><input type="number" value="175.0" name="v1" onchange="calc1()"></td>
-        </tr>
-        <tr>
-          <td><label>Percent (0 to 100):</label></td>
-          <td colspan="3"><input type="number" value="15.0" name="v2" onchange="calc1()"></td>
-        </tr>
-        <tr>
-          <td><label>Percent (0 to 100):</label></td>
-          <td colspan="3"><input type="range" min="0" max="100" step="5.0" value="15" name="v3" onchange="document.getElementsByName('v2')[0].value = this.value; calc1();"></td>
-        </tr>
-        <tr>
-          <td><label>Percent:</label></td>
-          <td>±</td>
-          <td id="r1"></td>
-          <td>%</td>
-        </tr>
-        <tr>
-          <td><label>Values:</label></td>
-          <td colspan="3" id="r2"></td>
-        </tr>
-        <tr>
-          <td><label>Upper:</label></td>
-          <td colspan="3" id="r3"></td>
-        </tr>
-        <tr>
-          <td><label>Lower:</label></td>
-          <td colspan="3" id="r4"></td>
-        </tr>
-        <tr>
-          <td><label>Reverse percentage:</label></td>
-          <td colspan="3" id="r5"></td>
-        </tr>
-        <tr>
-          <td><label>Reverse percentage f:</label></td>
-          <td colspan="3" id="r6"></td>
-        </tr>
-      </table>
-    </div>
     <div>
       <h3>Annuitätendarlehen-Rechner:</h3>
       <p>Legende: <code>A=Annuität</code>, <code>K=Darlehnsbetrag</code>, <code>p=Zinssatz</code>, <code>q=1+p</code>, <code>n=Darlehnslaufzeit</code>.</p>
-      <p>Werte für [K, p, n]: <input type="text" value="[1000, 0.07, 3]" name="vDarlehn" onchange="calc3()">.</p>
+      <p>Werte für [K, p, n]: <input type="text" value="[1000, 0.07, 3]" name="vDarlehn" onchange="calc_a()">.</p>
       <p>Annuität: <code id="eDarlehn"></code> (Summe: <code id="eDarlehn2"></code>).</p>
     </div>
-    <div lang="en">
-      <h3>Image width and height calculator:</h3>
-      <textarea id="ta1" rows="10" cols="50">One image URL per line...</textarea>
-      <p><button onclick="convert()">Convert</button></p>
-    </div>
     <div>
       <h3>Lineares Gleichungssystem lösen:</h3>
       <textarea id="ta2" rows="10" cols="50">1, 1, 0, 0, 0, 0, 0, 47
@@ -121,30 +73,7 @@ <h3>Lineares Gleichungssystem lösen:</h3>
     </div>
   </div>
   <script>
-      function calc1() {
-        try {
-          let v1 = parseFloat(document.getElementsByName("v1")[0].value);
-          let v2 = parseFloat(document.getElementsByName("v2")[0].value);
-          let v3 = (v2 / 100.0) * v1;
-          let v4 = v1 + v3;
-          let v5 = v1 - v3;
-          let v6 = Number((v1 / v4 - 1.0) * 100.0).toFixed(3);
-          let v7 = Number((v1 / v5 - 1.0) * 100.0).toFixed(3);
-          let v8 = Number((v1 / v4) * 100.0).toFixed(3);
-          let v9 = Number((v1 / v5) * 100.0).toFixed(3);
-          document.getElementById("r1").innerText = v2;
-          document.getElementById("r2").innerText = v1 + ", " + v2 + ", " + v3;
-          document.getElementById("r3").innerText = v4;
-          document.getElementById("r4").innerText = v5;
-          document.getElementById("r5").innerText = v6 + ", " + v7;
-          document.getElementById("r6").innerText = v8 + ", " + v9;
-        } catch (error) {
-          alert("The input values are not valid.");
-        }
-      }
-      calc1();
-
-      function calc3() {
+      function calc_a() {
         try {
           const json = JSON.parse(
             document.getElementsByName("vDarlehn")[0].value,
@@ -162,37 +91,7 @@ <h3>Lineares Gleichungssystem lösen:</h3>
           alert("The input values are not valid.");
         }
       }
-      calc3();
-
-      async function convert() {
-        let rows = document.getElementById("ta1").value.split("\n");
-        let s = "[\n";
-        for (let i = 0; i < rows.length; i++) {
-          let row = rows[i];
-          if (row.startsWith('"')) {
-            row = row.substring(1, row.length - 1);
-          }
-          s += await preloadImage(row);
-        }
-        s += "];";
-        document.getElementById("ta1").value = s;
-      }
-
-      async function preloadImage(imgSrc) {
-        let img = new Image();
-        try {
-          await new Promise((resolve, reject) => {
-            img.onload = () => resolve(img);
-            img.onerror = reject;
-            img.src = imgSrc;
-          });
-        } catch (error) {
-          return '  [ "' + imgSrc + '", ' + -1 + ", " + -1 + " ],\n";
-        }
-        return (
-          '  [ "' + imgSrc + '", ' + img.width + ", " + img.height + " ],\n"
-        );
-      }
+      calc_a();
 
       class GaussJordan {
         constructor(matrix) {

Start value:
Percent (0 to 100):
Percent (0 to 100):
Percent:	±	%
Values:
Upper:
Lower:
Reverse percentage:
Reverse percentage f: