事件学习 输入框的获取焦点和失去焦点的颜色变化
<!DOCTYPE html>
<html>
<head>
<title>事件学习</title>
</head>
<body>
<script type="text/javascript">
function myfocus(a){
a.style.background="red"
}
function myblur(a){
a.style.background="blue"
}
</script>
您的姓名：<input type="text" onfocus="myfocus(this)" onblur="myblur(this)">
</body>
</html>