exemploJs.html

<!DOCTYPE html>
  <head>
    <meta charset="utf-8" />
    <meta name="description" content="Uso do  JQuery Mask" />

    <script>
function carregar() {
    alert("Carregou a página");
}
</script>

    <title>Exemplos.</title>
 <link rel="stylesheet" href="css/style.css" type="text/css" media="screen">
  </head>

  <body onload="carregar()">
  Oi
  </body>
 </html>