js实现简单的点击按钮盒子消失效果

js实现简单的点击按钮盒子消失效果

实现
<!DOCTYPE html><html lang="en"><head>    <meta charset="UTF-8">    <title>Title</title>    <style>        #box1{             width: 100px;            height: 100px;        background: red;        }    </style></head><body><input type="button" value="点我" id="box2"><div id="box1"></div><script>    box1=document.getElementById("box1");    box2=document.getElementById("box2");    box2.onclick=zi1;    function zi1() {         if(box1.style.display=="none"){             box1.style.display="block"        }else{             box1.style.display="none"        }    }</script></body></html>