I saw a lot of decisions all over the web. And all of them was not simple enough. Then I had an idea to create a very simple function which allows to create and switch the tabs on your website.

First of all lets look at tabs html

	<li><a href="javascript:rudrSwitchTab('tb_1', 'content_1');" id="tb_1" class="tabmenu active">Tab 1</a></li>
	<li><a href="javascript:rudrSwitchTab('tb_2', 'content_2');" id="tb_2" class="tabmenu">Tab 2</a></li>
<div id="content_1" class="tabcontent"> 
	Content of the first tab.
<div id="content_2" class="tabcontent" style="display:none;">
	Content of the second tab.

The next step

The next step is a JavaScript function, you can insert it anywhere on the page (do not forget about <script> tags) or to another js file.

function rudrSwitchTab(rudr_tab_id, rudr_tab_content) {
	// first of all we get all tab content blocks (I think the best way to get them by class names)
	var x = document.getElementsByClassName("tabcontent");
	var i;
	for (i = 0; i < x.length; i++) {
		x[i].style.display = 'none'; // hide all tab content
	document.getElementById(rudr_tab_content).style.display = 'block'; // display the content of the tab we need
	// now we get all tab menu items by class names (use the next code only if you need to highlight current tab)
	var x = document.getElementsByClassName("tabmenu");
	var i;
	for (i = 0; i < x.length; i++) {
		x[i].className = 'tabmenu'; 
	document.getElementById(rudr_tab_id).className = 'tabmenu active';

That’s it. You can now add a bit of CSS rules and then your tabs will be ready.