abstract：<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>事件</title><script>function srk(a) {a.style.background="#87CEFF"
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>事件</title><script>
function srk(a) {
a.style.background="#87CEFF";
}
</script>
</head>
<body>
<input type="text" onfocus="srk(this)">
</body>
</html>
Correcting teacher：灭绝师太Correction time：2019-03-22 13:55:06
Teacher's summary：事件方法后期使用 频率很高哦,要好好掌握!