x
1
2
<html>3
<head>4
<style>5
input:focus {6
background-color: yellow;7
}8
</style>9
</head>10
<body>11
12
<p>Click inside the text fields to see a yellow background:</p>13
14
<form>15
First name: <input type="text" name="firstname"><br>16
Last name: <input type="text" name="lastname">17
</form>18
19
</body>20
</html>Click inside the text fields to see a yellow background: