[Vulkan]

<style type="text/css">
div {width:100px; height:100px; color:#fff; float:left; margin:10px;}
</style>

<script type="text/javascript">
function example() {
    var node = document.getElementById("node"),
        nodeTwo = document.getElementById("node-two");
    if (node.style.display == 'none') {
        node.style.display = '';
        nodeTwo.style.display = 'none';
    } else {
        node.style.display = 'none';
        nodeTwo.style.display = '';
    }
}
</script>

<div id="node" style="background:black;">часть 1</div>
<div id="node-two" style="background:red;">часть 2</div>

<input type="button" value="Смотреть!" onclick="example();">