create admin form

scripts/form.js

@@ -0,0 +1,28 @@
+document.addEventListener('DOMContentLoaded', function () {
+    const submit = document.getElementById('submitbtn');
+    submit.addEventListener('click', async () => {
+        submit.disabled = true;
+        const action = submit.parentElement.action;
+        try {
+            const resp = await fetch(action, {
+                method: 'POST',
+                body: JSON.stringify({
+                    os: document.getElementById('os-select').value,
+                    form: document.getElementById('form-select').value
+                }),
+                headers: {
+                    "Content-Type": "application/json",
+                }
+            });
+            if (!resp.ok) {
+                throw new Error(`Response status: ${resp.status}`);
+            }
+            location.reload();
+            return false;
+        }
+        catch (error) {
+            console.error(error.message);
+            alert(error.message);
+        }
+    });
+});