<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<script>
function change(){
var div=document.getElementById("div1");/*w和h都要用这部分，故单独定义一个div*/
var w=parseInt(div.style.width);
var h=parseInt(div.style.height);
div.style.width=(w+30)+"px";
div.style.height=(h+50)+"px";
}
</script>
</head>
<body>
<div id="div1" style="width: 150px;height: 123px;background-color: aqua"></div> <!--设置div初始状态-->
<button onclick="change()">改变样式</button>
</body>
</html>
点击后：
