js-02-2

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
</head>
<body>
    <div id="div1">贱人,马蓉,点我变大!</div>
    <input id="btn1" type="button" value="点我回到过去">
    <script>
        window.onload = function(){
            var oDiv = document.getElementById('div1')
            var oBtn = document.getElementById('btn1')
            oDiv.onclick = function(){
                oDiv.style.cssText = '200px; height:200px; border : 1px solid red'
            }
            oBtn.onclick = function(){
                oDiv.style.cssText = ''
            }
        }
    </script>
</body>
</html>