diff --git a/src/main/java/com/jetbrains/help/context/CertificateContextHolder.java b/src/main/java/com/jetbrains/help/context/CertificateContextHolder.java
index e0acbfa..154c24c 100644
--- a/src/main/java/com/jetbrains/help/context/CertificateContextHolder.java
+++ b/src/main/java/com/jetbrains/help/context/CertificateContextHolder.java
@@ -78,7 +78,7 @@ public class CertificateContextHolder {
         return CertificateContextHolder.crtFile;
     }
 
-    private static void generateCertificate() {
+    public static void generateCertificate() {
         KeyPair keyPair = SecureUtil.generateKeyPair("RSA", 4096);
         PrivateKey privateKey = keyPair.getPrivate();
         PublicKey publicKey = keyPair.getPublic();
diff --git a/src/main/resources/static/js/index.js b/src/main/resources/static/js/index.js
index 0f3af82..6875a7b 100644
--- a/src/main/resources/static/js/index.js
+++ b/src/main/resources/static/js/index.js
@@ -1,83 +1,71 @@
-window.submitLicenseInfo = function () {
-    let licenseeName = document.getElementById('licenseeName').value
-    let assigneeName = document.getElementById('assigneeName').value
-    let expiryDate = document.getElementById('expiryDate').value
-    let licenseInfo = {
-        licenseeName: licenseeName,
-        assigneeName: assigneeName,
-        expiryDate: expiryDate
-    }
-    localStorage.setItem('licenseInfo', JSON.stringify(licenseInfo))
-    document.getElementById('mask').style.display = 'none'
-    document.getElementById('form').style.display = 'none'
-}
-document.getElementById('search').oninput = function (e) {
-    $("#product-list").load('/search?search=' + e.target.value)
-}
-window.showLicenseForm = function () {
-    let licenseInfo = localStorage.getItem('licenseInfo');
-    if (licenseInfo !== null) {
-        licenseInfo = JSON.parse(licenseInfo)
-        document.getElementById('licenseeName').value = licenseInfo.licenseeName
-        document.getElementById('assigneeName').value = licenseInfo.assigneeName
-        document.getElementById('expiryDate').value = licenseInfo.expiryDate
-    } else {
-        document.getElementById('licenseeName').value = '光云'
-        document.getElementById('assigneeName').value = '藏柏'
-        document.getElementById('expiryDate').value = '2111-11-11'
-    }
-    document.getElementById('mask').style.display = 'block'
-    document.getElementById('form').style.display = 'block'
-}
-window.showVmoptins = function () {
-    alert("-javaagent:/(Your Path)/ja-netfilter/ja-netfilter.jar\n" +
-        "--add-opens=java.base/jdk.internal.org.objectweb.asm=ALL-UNNAMED\n" +
-        "--add-opens=java.base/jdk.internal.org.objectweb.asm.tree=ALL-UNNAMED")
-}
-//@see https://zhuanlan.zhihu.com/p/597944027
-const copyText = async (val) => {
-    if (navigator.clipboard && navigator.permissions) {
-        await navigator.clipboard.writeText(val)
-    } else {
-        const textArea = document.createElement('textArea')
-        textArea.value = val
-        textArea.style.width = 0
-        textArea.style.position = 'fixed'
-        textArea.style.left = '-999px'
-        textArea.style.top = '10px'
-        textArea.setAttribute('readonly', 'readonly')
-        document.body.appendChild(textArea)
-
-        textArea.select()
-        document.execCommand('copy')
-        document.body.removeChild(textArea)
-    }
-}
-window.copyLicense = async function (e) {
-
-    while (localStorage.getItem('licenseInfo') === null) {
-        document.getElementById('mask').style.display = 'block'
-        document.getElementById('form').style.display = 'block'
-        await new Promise(r => setTimeout(r, 1000));
-    }
-    let licenseInfo = JSON.parse(localStorage.getItem('licenseInfo'))
-    let productCode = e.closest('.card').dataset.productCodes;
-    let data = {
-        "licenseName": licenseInfo.licenseeName,
-        "assigneeName": licenseInfo.assigneeName,
-        "expiryDate": licenseInfo.expiryDate,
-        "productCode": productCode,
-    }
-    let resp = await fetch('/generateLicense', {
-        method: 'POST',
+$(document).ready(function() {
+    // Set default headers for AJAX requests
+    $.ajaxSetup({
         headers: {
             'Content-Type': 'application/json'
-        },
-        body: JSON.stringify(data)
-    }).then(response => response.text())
+        }
+    });
 
-    copyText(resp)
-        .then(() => {
-            alert("The activation code has been copied");
-        })
-}
\ No newline at end of file
+    // Function to handle submission of license information
+    window.submitLicenseInfo = function () {
+        let licenseInfo = {
+            licenseeName: $('#licenseeName').val(),
+            assigneeName: $('#assigneeName').val(),
+            expiryDate: $('#expiryDate').val()
+        };
+        localStorage.setItem('licenseInfo', JSON.stringify(licenseInfo));
+        $('#mask, #form').hide();
+    };
+
+    // Function to handle search input
+    $('#search').on('input', function(e) {
+        $("#product-list").load('/search?search=' + e.target.value);
+    });
+
+    // Function to show license form
+    window.showLicenseForm = function () {
+        let licenseInfo = JSON.parse(localStorage.getItem('licenseInfo'));
+        $('#licenseeName').val(licenseInfo?.licenseeName || '光云');
+        $('#assigneeName').val(licenseInfo?.assigneeName || '藏柏');
+        $('#expiryDate').val(licenseInfo?.expiryDate || '2111-11-11');
+        $('#mask, #form').show();
+    };
+
+    // Function to show VM options
+    window.showVmoptins = function () {
+        alert("-javaagent:/(Your Path)/ja-netfilter/ja-netfilter.jar\n" +
+            "--add-opens=java.base/jdk.internal.org.objectweb.asm=ALL-UNNAMED\n" +
+            "--add-opens=java.base/jdk.internal.org.objectweb.asm.tree=ALL-UNNAMED");
+    };
+
+    // Function to copy license
+    window.copyLicense = async function (e) {
+        while (localStorage.getItem('licenseInfo') === null) {
+            $('#mask, #form').show();
+            await new Promise(r => setTimeout(r, 1000));
+        }
+        let licenseInfo = JSON.parse(localStorage.getItem('licenseInfo'));
+        let productCode = $(e).closest('.card').data('productCodes');
+        let data = {
+            "licenseName": licenseInfo.licenseeName,
+            "assigneeName": licenseInfo.assigneeName,
+            "expiryDate": licenseInfo.expiryDate,
+            "productCode": productCode,
+        };
+        $.post('/generateLicense', JSON.stringify(data))
+            .then(response => {
+                copyText(response)
+                    .then(() => {
+                        alert("The activation code has been copied");
+                    });
+            });
+    };
+
+// Function to copy text to clipboard
+    const copyText = async (val) => {
+        if (navigator.clipboard && navigator.permissions) {
+            await navigator.clipboard.writeText(val);
+        }
+    };
+
+});
diff --git a/src/main/resources/templates/index.html b/src/main/resources/templates/index.html
index 91b3374..aeafa20 100644
--- a/src/main/resources/templates/index.html
+++ b/src/main/resources/templates/index.html
@@ -101,6 +101,6 @@
     </div>
 </div>
 </body>
-<script type="text/javascript" src="/js/index.js"></script>
 <script type="text/javascript" src="/js/jquery.js"></script>
+<script type="text/javascript" src="/js/index.js"></script>
 </html>
\ No newline at end of file