diff --git a/adminer/include/functions.inc.php b/adminer/include/functions.inc.php
index ad71a341..81951fae 100644
--- a/adminer/include/functions.inc.php
+++ b/adminer/include/functions.inc.php
@@ -1383,7 +1383,7 @@ function edit_form($TABLE, $fields, $row, $update) {
 		}
 	}
 	echo ($update ? "<input type='submit' name='delete' value='" . lang('Delete') . "'" . confirm() . ">\n"
-		: ($_POST || !$fields ? "" : "<script type='text/javascript'>focus(qs('#form').getElementsByTagName('td')[1].firstChild);</script>\n")
+		: ($_POST || !$fields ? "" : "<script type='text/javascript'>focus(qsa('td', qs('#form'))[1].firstChild);</script>\n")
 	);
 	if (isset($_GET["select"])) {
 		hidden_fields(array("check" => (array) $_POST["check"], "clone" => $_POST["clone"], "all" => $_POST["all"]));
diff --git a/adminer/static/editing.js b/adminer/static/editing.js
index a1c1438f..e82dd5f4 100644
--- a/adminer/static/editing.js
+++ b/adminer/static/editing.js
@@ -23,7 +23,7 @@ function bodyLoad(version) {
 			jush.custom_links = jushLinks;
 		}
 		jush.highlight_tag('code', 0);
-		var tags = document.getElementsByTagName('textarea');
+		var tags = qsa('textarea', document);
 		for (var i = 0; i < tags.length; i++) {
 			if (/(^|\s)jush-/.test(tags[i].className)) {
 				var pre = jush.textarea(tags[i]);
@@ -98,14 +98,14 @@ function dbChange(el) {
 */
 function selectFieldChange(form) {
 	var ok = (function () {
-		var inputs = form.getElementsByTagName('input');
+		var inputs = qsa('input', form);
 		for (var i=0; i < inputs.length; i++) {
 			if (inputs[i].value && /^fulltext/.test(inputs[i].name)) {
 				return true;
 			}
 		}
 		var ok = form.limit.value;
-		var selects = form.getElementsByTagName('select');
+		var selects = qsa('select', form);
 		var group = false;
 		var columns = {};
 		for (var i=0; i < selects.length; i++) {
@@ -218,14 +218,14 @@ function editingAddRow(button, focus) {
 	var x = match[0] + (match[2] ? added.substr(match[2].length) : added) + '1';
 	var row = parentTag(button, 'tr');
 	var row2 = cloneNode(row);
-	var tags = row.getElementsByTagName('select');
-	var tags2 = row2.getElementsByTagName('select');
+	var tags = qsa('select', row);
+	var tags2 = qsa('select', row2);
 	for (var i=0; i < tags.length; i++) {
 		tags2[i].name = tags[i].name.replace(/[0-9.]+/, x);
 		tags2[i].selectedIndex = tags[i].selectedIndex;
 	}
-	tags = row.getElementsByTagName('input');
-	tags2 = row2.getElementsByTagName('input');
+	tags = qsa('input', row);
+	tags2 = qsa('input', row2);
 	var input = tags2[0]; // IE loose tags2 after insertBefore()
 	for (var i=0; i < tags.length; i++) {
 		if (tags[i].name == 'auto_increment_col') {
@@ -364,9 +364,9 @@ function editingLengthBlur(edit) {
 * @param number
 */
 function columnShow(checked, column) {
-	var trs = qs('#edit-fields').getElementsByTagName('tr');
+	var trs = qsa('tr', qs('#edit-fields'));
 	for (var i=0; i < trs.length; i++) {
-		alterClass(trs[i].getElementsByTagName('td')[column], 'hidden', !checked);
+		alterClass(qsa('td', trs[i])[column], 'hidden', !checked);
 	}
 }
 
@@ -407,7 +407,7 @@ function partitionNameChange(el) {
 function foreignAddRow(field) {
 	field.onchange = function () { };
 	var row = cloneNode(parentTag(field, 'tr'));
-	var selects = row.getElementsByTagName('select');
+	var selects = qsa('select', row);
 	for (var i=0; i < selects.length; i++) {
 		selects[i].name = selects[i].name.replace(/\]/, '1$&');
 		selects[i].selectedIndex = 0;
@@ -423,12 +423,12 @@ function foreignAddRow(field) {
 function indexesAddRow(field) {
 	field.onchange = function () { };
 	var row = cloneNode(parentTag(field, 'tr'));
-	var selects = row.getElementsByTagName('select');
+	var selects = qsa('select', row);
 	for (var i=0; i < selects.length; i++) {
 		selects[i].name = selects[i].name.replace(/indexes\[\d+/, '$&1');
 		selects[i].selectedIndex = 0;
 	}
-	var inputs = row.getElementsByTagName('input');
+	var inputs = qsa('input', row);
 	for (var i=0; i < inputs.length; i++) {
 		inputs[i].name = inputs[i].name.replace(/indexes\[\d+/, '$&1');
 		inputs[i].value = '';
@@ -443,7 +443,7 @@ function indexesAddRow(field) {
 function indexesChangeColumn(field, prefix) {
 	var names = [];
 	for (var tag in { 'select': 1, 'input': 1 }) {
-		var columns = parentTag(field, 'td').getElementsByTagName(tag);
+		var columns = qsa(tag, parentTag(field, 'td'));
 		for (var i=0; i < columns.length; i++) {
 			if (/\[columns\]/.test(columns[i].name)) {
 				var value = selectValue(columns[i]);
@@ -472,13 +472,13 @@ function indexesAddColumn(field, prefix) {
 		select.onchange();
 	}
 	var column = cloneNode(field.parentNode);
-	var selects = column.getElementsByTagName('select');
+	var selects = qsa('select', column);
 	for (var i = 0; i < selects.length; i++) {
 		select = selects[i];
 		select.name = select.name.replace(/\]\[\d+/, '$&1');
 		select.selectedIndex = 0;
 	}
-	var inputs = column.getElementsByTagName('input');
+	var inputs = qsa('input', column);
 	for (var i = 0; i < inputs.length; i++) {
 		var input = inputs[i];
 		input.name = input.name.replace(/\]\[\d+/, '$&1');
@@ -529,7 +529,7 @@ function schemaMousemove(ev) {
 		ev = ev || event;
 		var left = (ev.clientX - x) / em;
 		var top = (ev.clientY - y) / em;
-		var divs = that.getElementsByTagName('div');
+		var divs = qsa('div', that);
 		var lineSet = { };
 		for (var i=0; i < divs.length; i++) {
 			if (divs[i].className == 'references') {
diff --git a/adminer/static/functions.js b/adminer/static/functions.js
index e332373e..e503e37d 100644
--- a/adminer/static/functions.js
+++ b/adminer/static/functions.js
@@ -7,6 +7,15 @@ function qs(selector) {
 	return document.querySelector(selector);
 }
 
+/** Get all elements by selector
+* @param string
+* @param HTMLElement
+* @return NodeList
+*/
+function qsa(selector, context) {
+	return context.querySelectorAll(selector);
+}
+
 /** Add or remove CSS class
 * @param HTMLElement
 * @param string
@@ -116,7 +125,7 @@ function trCheck(el) {
 */
 function selectCount(id, count) {
 	setHtml(id, (count === '' ? '' : '(' + (count + '').replace(/\B(?=(\d{3})+$)/g, ' ') + ')'));
-	var inputs = qs('#' + id).parentNode.parentNode.getElementsByTagName('input');
+	var inputs = qsa('input', qs('#' + id).parentNode.parentNode);
 	for (var i = 0; i < inputs.length; i++) {
 		var input = inputs[i];
 		if (input.type == 'submit') {
@@ -142,10 +151,10 @@ function formCheck(el, name) {
 /** Check all rows in <table class="checkable">
 */
 function tableCheck() {
-	var tables = document.getElementsByTagName('table');
+	var tables = qsa('table', document);
 	for (var i=0; i < tables.length; i++) {
 		if (/(^|\s)checkable(\s|$)/.test(tables[i].className)) {
-			var trs = tables[i].getElementsByTagName('tr');
+			var trs = qsa('tr', tables[i]);
 			for (var j=0; j < trs.length; j++) {
 				trCheck(trs[j].firstChild.firstChild);
 			}
@@ -218,7 +227,7 @@ function checkboxClick(event, el) {
 	}
 	if (event.shiftKey && (!lastChecked || lastChecked.name == el.name)) {
 		var checked = (lastChecked ? lastChecked.checked : true);
-		var inputs = parentTag(el, 'table').getElementsByTagName('input');
+		var inputs = qsa('input', parentTag(el, 'table'));
 		var checking = !lastChecked;
 		for (var i=0; i < inputs.length; i++) {
 			var input = inputs[i];
@@ -310,12 +319,12 @@ function selectAddRow(field) {
 	};
 	field.onchange();
 	var row = cloneNode(field.parentNode);
-	var selects = row.getElementsByTagName('select');
+	var selects = qsa('select', row);
 	for (var i=0; i < selects.length; i++) {
 		selects[i].name = selects[i].name.replace(/[a-z]\[\d+/, '$&1');
 		selects[i].selectedIndex = 0;
 	}
-	var inputs = row.getElementsByTagName('input');
+	var inputs = qsa('input', row);
 	for (var i=0; i < inputs.length; i++) {
 		inputs[i].name = inputs[i].name.replace(/[a-z]\[\d+/, '$&1');
 		inputs[i].className = '';
@@ -355,7 +364,7 @@ function selectSearchSearch(el) {
  * @param [string] extra class name
  */
 function columnMouse(el, className) {
-	var spans = el.getElementsByTagName('span');
+	var spans = qsa('span', el);
 	for (var i=0; i < spans.length; i++) {
 		if (/column/.test(spans[i].className)) {
 			spans[i].className = 'column' + (className || '');
@@ -371,7 +380,7 @@ function columnMouse(el, className) {
 function selectSearch(name) {
 	var el = qs('#fieldset-search');
 	el.className = '';
-	var divs = el.getElementsByTagName('div');
+	var divs = qsa('div', el);
 	for (var i=0; i < divs.length; i++) {
 		var div = divs[i];
 		if (isTag(div.firstChild, 'select') && selectValue(div.firstChild) == name) {
@@ -501,7 +510,7 @@ function keyupChange() {
 */
 function fieldChange(field) {
 	var row = cloneNode(parentTag(field, 'tr'));
-	var inputs = row.getElementsByTagName('input');
+	var inputs = qsa('input', row);
 	for (var i = 0; i < inputs.length; i++) {
 		inputs[i].value = '';
 	}
@@ -592,7 +601,7 @@ function ajaxForm(form, message, button) {
 	return ajax(url, function (request) {
 		setHtml('ajaxstatus', request.responseText);
 		if (window.jush) {
-			jush.highlight_tag(qs('#ajaxstatus').getElementsByTagName('code'), 0);
+			jush.highlight_tag(qsa('code', qs('#ajaxstatus')), 0);
 		}
 	}, data, message);
 }
@@ -635,7 +644,7 @@ function selectClick(td, event, text, warning) {
 		});
 		input.rows = rows;
 	}
-	if (value == '\u00A0' || td.getElementsByTagName('i').length) { // &nbsp; or i - NULL
+	if (value == '\u00A0' || qsa('i', td).length) { // &nbsp; or i - NULL
 		value = '';
 	}
 	if (document.selection) {
@@ -719,7 +728,7 @@ function eventStop(event) {
 */
 function setupSubmitHighlight(parent) {
 	for (var key in { input: 1, select: 1, textarea: 1 }) {
-		var inputs = parent.getElementsByTagName(key);
+		var inputs = qsa(key, parent);
 		for (var i = 0; i < inputs.length; i++) {
 			setupSubmitHighlightInput(inputs[i])
 		}
@@ -764,7 +773,7 @@ function findDefaultSubmit(el) {
 	if (el.jushTextarea) {
 		el = el.jushTextarea;
 	}
-	var inputs = el.form.getElementsByTagName('input');
+	var inputs = qsa('input', el.form);
 	for (var i = 0; i < inputs.length; i++) {
 		var input = inputs[i];
 		if (input.type == 'submit' && !input.style.zIndex) {
diff --git a/plugins/tables-filter.php b/plugins/tables-filter.php
index 0319bbf1..4c14b672 100644
--- a/plugins/tables-filter.php
+++ b/plugins/tables-filter.php
@@ -40,9 +40,9 @@ function tablesFilter(){
 	if (sessionStorage) {
 		sessionStorage.setItem('adminer_tables_filter', value);
 	}
-	var tables = qs('#tables').getElementsByTagName('li');
+	var tables = qsa('li', qs('#tables'));
 	for (var i = 0; i < tables.length; i++) {
-		var a = tables[i].getElementsByTagName('a')[1];
+		var a = qsa('a', tables[i])[1];
 		var text = tables[i].getAttribute('data-table-name');
 		if (value == '') {
 			tables[i].className = '';