  <script>
      document.getElementById('checkForm').addEventListener('submit', function(e) {
          e.preventDefault();
  
          const userid = document.getElementById('userid').value;
          const zoneid = document.getElementById('zoneid').value;
          const hasilKalkulasiDiv = document.getElementById('HasilKalkulasi');
  
          if (!userid || !zoneid || isNaN(parseInt(userid)) || isNaN(parseInt(zoneid))) {
              hasilKalkulasiDiv.innerHTML = `<div class="mt-4 p-4 bg-green-100 text-green-700 border border-green-300 rounded-md"><strong class="text-primary">Invalid Input Value</strong></div>`;
              return;
          }
  
          // Menggunakan URLSearchParams untuk mengirim data
          const params = new URLSearchParams();
          params.append('userid', userid);
          params.append('zoneid', zoneid);
  
          fetch('https://haryonokudadiri.com/api/v1/check-region', {
              method: 'POST',
              body: params,
              headers: {
                  'Content-Type': 'application/x-www-form-urlencoded'
              }
          })
          .then(response => response.json())
          .then(data => {
              if (data.success === true) {
                  hasilKalkulasiDiv.innerHTML = `
                      
                      <div class="mt-4 p-4 bg-green-100 text-green-700 border border-green-300 rounded-md">
                        <span>
                        <strong>User ID:</strong> ${userid}<br>
                        <strong>Server ID:</strong> ${zoneid}<br>
                        <strong>Nickname:</strong> ${data.username}<br>
                        <strong>Country:</strong> ${data.region}
                    </span>
                    </div>`;
              } else {
                  hasilKalkulasiDiv.innerHTML = `<div class="rounded-md border border-transparent bg-muted p-4 text-center text-sm font-semibold uppercase ring-1 ring-primary"><strong class="text-primary">${data.message}</strong></div>`;
              }
          })
          .catch(error => {
              hasilKalkulasiDiv.innerHTML = `<div class="rounded-md border border-transparent bg-muted p-4 text-center text-sm font-semibold uppercase ring-1 ring-primary"><strong class="text-primary">${error.message}</strong></div>`;
          });
      });
      </script>