diff --git a/adminer/db.inc.php b/adminer/db.inc.php
index b93ca700..a341d1b9 100644
--- a/adminer/db.inc.php
+++ b/adminer/db.inc.php
@@ -135,7 +135,7 @@ if ($adminer->homepage()) {
 					echo (support("copy") ? " <input type='submit' name='copy' value='" . lang('Copy') . "'>" : "");
 					echo "\n";
 				}
-				echo "<input type='hidden' name='all' value='' onclick=\"selectCount('selected', formChecked.call(this, /^(tables|views)\[/));" . (support("table") ? " selectCount('selected2', formChecked.call(this, /^tables\[/) || $tables);" : "") . "\">\n"; // used by trCheck()
+				echo "<input type='hidden' name='all' value='' onclick=\"selectCount('selected', formChecked(this, /^(tables|views)\[/));" . (support("table") ? " selectCount('selected2', formChecked.call(this, /^tables\[/) || $tables);" : "") . "\">\n"; // used by trCheck()
 				echo "<input type='hidden' name='token' value='$token'>\n";
 				echo "</div></fieldset>\n";
 			}
diff --git a/adminer/include/connect.inc.php b/adminer/include/connect.inc.php
index 40074132..061475a1 100644
--- a/adminer/include/connect.inc.php
+++ b/adminer/include/connect.inc.php
@@ -56,7 +56,7 @@ function connect_error() {
 			echo "</table>\n";
 			echo (support("database")
 				? "<fieldset><legend>" . lang('Selected') . " <span id='selected'></span></legend><div>\n"
-					. "<input type='hidden' name='all' value='' onclick=\"selectCount('selected', formChecked.call(this, /^db/));\">\n" // used by trCheck()
+					. "<input type='hidden' name='all' value='' onclick=\"selectCount('selected', formChecked(this, /^db/));\">\n" // used by trCheck()
 					. "<input type='submit' name='drop' value='" . lang('Drop') . "'" . confirm() . ">\n"
 					. "</div></fieldset>\n"
 				: ""
diff --git a/adminer/select.inc.php b/adminer/select.inc.php
index 191b28a7..8ccaeeda 100644
--- a/adminer/select.inc.php
+++ b/adminer/select.inc.php
@@ -488,7 +488,7 @@ if (!$columns && support("table")) {
 			echo "<p class='count'>\n";
 			echo ($found_rows !== false ? "(" . ($exact_count ? "" : "~ ") . lang('%d row(s)', $found_rows) . ") " : "");
 			$display_rows = ($exact_count ? "" : "~ ") . $found_rows;
-			echo checkbox("all", 1, 0, lang('whole result'), "var checked = formChecked.call(this, /check/); selectCount('selected', this.checked ? '$display_rows' : checked); selectCount('selected2', this.checked || !checked ? '$display_rows' : checked);") . "\n";
+			echo checkbox("all", 1, 0, lang('whole result'), "var checked = formChecked(this, /check/); selectCount('selected', this.checked ? '$display_rows' : checked); selectCount('selected2', this.checked || !checked ? '$display_rows' : checked);") . "\n";
 
 			if ($adminer->selectCommandPrint()) {
 				?>
diff --git a/adminer/static/functions.js b/adminer/static/functions.js
index 582979c2..f43e3a91 100644
--- a/adminer/static/functions.js
+++ b/adminer/static/functions.js
@@ -172,13 +172,13 @@ function formUncheck(id) {
 }
 
 /** Get number of checked elements matching given name
+* @param HTMLInputElement
 * @param RegExp
 * @return number
-* @this HTMLInputElement
 */
-function formChecked(name) {
+function formChecked(el, name) {
 	var checked = 0;
-	var elems = this.form.elements;
+	var elems = el.form.elements;
 	for (var i=0; i < elems.length; i++) {
 		if (name.test(elems[i].name) && elems[i].checked) {
 			checked++;