<!DOCTYPE html>
<html>
<body>
Enter your name:
<input type="text" onfocus="myFunction(this)">
<p>When the input field gets focus, a function is triggered which changes the background-color.</p>
<script>
function myFunction(x) {
x.style.background = "yellow";
}
</script>
</body>
</html>
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You can use [html][/html], [css][/css], [php][/php] and more to embed the code. Urls are automatically hyperlinked. Line breaks and paragraphs are automatically generated.