Події
<button onclick="F1()">Кнопка</button>
<p onmouseover="this.style.color = 'red'">Текст</p>
<input onkeydown="F1()">
<select onchange="F1()">
<input oninput="F1()">
<body onload="F1()">
<button onclick="F1()">Кнопка</button>
<p onmouseover="this.style.color = 'red'">Текст</p>
<input onkeydown="F1()">
<select onchange="F1()">
<input oninput="F1()">
<body onload="F1()">