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<< Click to Display Table of Contents >> Hello |
  
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<< Click to Display Table of Contents >> Hello |
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Tela
Olá mundo!
Fonte
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
</head>
<body>
<script>
// escreve na pagina
document.write('Olá <strong>mundo!</strong>');
// caixa de dialog
alert('Opa!');
</script>
</body>
</html>