????：<!DOCTYPE html><html><head><meta charset="UTF-8"><title>Document</title><script type="text/javascript">function mybgc(t){t.style.backgroun
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
<script type="text/javascript">
function mybgc(t){
t.style.background = "red";
}
</script>
</head>
<body>
姓名：<input type="text" name="username" onfocus="mybgc(this)">
</body>
</html>
?? ???：韋小寶?? ??：2019-01-10 16:43:07
???? ??：JavaScript的事件不僅僅這一個(gè)啊 課后記得把其他的事件都給多練習(xí)幾遍哦