diff --git a/metallzuschlagindex.php b/metallzuschlagindex.php
index a715625..fd929e5 100755
--- a/metallzuschlagindex.php
+++ b/metallzuschlagindex.php
@@ -350,13 +350,22 @@ if (!empty($cablesWithKupfer) && !empty($chartData['labels'])) {
 	print '<tr class="oddeven">';
 	print '<td colspan="4">';
 	print '<button type="submit" class="butAction small">'.$langs->trans("Refresh").'</button> ';
-	print '<a class="butAction small" href="'.$baseUrl.'&cable_mode='.$cableMode.'">'.$langs->trans("MetallzuschlagAllCables").'</a>';
+	print '<a class="butAction small" href="#" onclick="metallzuschlagToggleAllCables(); return false;">'.$langs->trans("MetallzuschlagAllCables").'</a>';
 	print '</td>';
 	print '</tr>';
 	print '</table>';
 	print '</form>';
 	print '</div>';
 
+	// JavaScript fuer Toggle alle Kabel
+	print '<script>';
+	print 'function metallzuschlagToggleAllCables() {';
+	print '  var checkboxes = document.querySelectorAll(\'input[name="cable_ids[]"]\');';
+	print '  var allChecked = Array.from(checkboxes).every(cb => cb.checked);';
+	print '  checkboxes.forEach(cb => cb.checked = !allChecked);';
+	print '}';
+	print '</script>';
+
 	// Kabel-Chart-Daten holen
 	$cableChartData = $api->getCableChartData($chartDays, $cableIds, $cableMode);