[HTML] pobierz, plaintext 
<input type="text" onfocus="this.style.backgroundColor='red'" onblur="this.style.backgroundColor='white'">
[HTML] pobierz, plaintext 

[HTML] pobierz, plaintext 
<style>
input {
background: #eee;
}
input:focus {
background: #ccc;
}
</style>
[HTML] pobierz, plaintext