diff --git a/adminer/static/editing.js b/adminer/static/editing.js
index 97fa5327..4f0315ff 100644
--- a/adminer/static/editing.js
+++ b/adminer/static/editing.js
@@ -34,7 +34,7 @@ function bodyLoad(version, maria) {
 			jush.custom_links = jushLinks;
 		}
 		jush.highlight_tag('code', 0);
-		var tags = qsa('textarea', document);
+		var tags = qsa('textarea');
 		for (var i = 0; i < tags.length; i++) {
 			if (/(^|\s)jush-/.test(tags[i].className)) {
 				var pre = jush.textarea(tags[i]);
@@ -75,7 +75,7 @@ function typePassword(el, disable) {
 * @param [HTMLElement]
 */
 function messagesPrint(el) {
-	var els = qsa('.toggle', el || document);
+	var els = qsa('.toggle', el);
 	for (var i = 0; i < els.length; i++) {
 		els[i].onclick = partial(toggle, els[i].getAttribute('href').substr(1));
 	}
diff --git a/adminer/static/functions.js b/adminer/static/functions.js
index cb6be6b3..5b4f3ed2 100644
--- a/adminer/static/functions.js
+++ b/adminer/static/functions.js
@@ -14,17 +14,17 @@ function qs(selector, context) {
 * @return HTMLElement
 */
 function qsl(selector, context) {
-	var els = qsa(selector, context || document);
+	var els = qsa(selector, context);
 	return els[els.length - 1];
 }
 
 /** Get all elements by selector
 * @param string
-* @param HTMLElement
+* @param [HTMLElement] defaults to document
 * @return NodeList
 */
 function qsa(selector, context) {
-	return context.querySelectorAll(selector);
+	return (context || document).querySelectorAll(selector);
 }
 
 /** Return a function calling fn with the next arguments
@@ -205,7 +205,7 @@ function formCheck(name) {
 /** Check all rows in <table class="checkable">
 */
 function tableCheck() {
-	var inputs = qsa('table.checkable td:first-child input', document);
+	var inputs = qsa('table.checkable td:first-child input');
 	for (var i=0; i < inputs.length; i++) {
 		trCheck(inputs[i]);
 	}