CSS Onclick изменить цвет
<style>
.dabutton:focus {
background-color:yellow;
}
</style>
<button class="dabutton"></button> // <-- usage
Poised Penguin
<style>
.dabutton:focus {
background-color:yellow;
}
</style>
<button class="dabutton"></button> // <-- usage<html>
<head>
<title>this is coding</title>
<center>
<h1 align="center"><span style="background-color:#00FF00">this is a nice piece of art