JS示例01-鼠标移入移出事件

一、知识要点

1、匿名函数
2、鼠标事件
3、document.getElementById()
4、window.onload
5、行间事件提取

二、源码参考

<!DOCTYPE >
<html>

    <head>
        <title></title>
        <meta charset="utf-8">
        <style>
            #div1 {
                width: 200px;
                height: 100px;
                background-color: #ccc;
                border: 1px solid #999;
                display: none;
            }
        </style>
        <script>
            window.onload = function() {
                var input1 = document.getElementById('input1');
                var div1 = document.getElementById('div1');
                input1.onmouseover = function() {
                    div1.style.display = 'block';
                }
                input1.onmouseout = function() {
                    div1.style.display = 'none';
                }
            }
        </script>
    </head>

    <body>
        <input id="input1" type="checkbox" value="checkbox" />
        <div id="div1">
            为了您的信息安全...
        </div>
    </body>

</html>

三、运行效果

image

分享隐藏显示

<!DOCTYPE HTML>
<html>

<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <title>无标题文档</title>
    <style>
        #div1 {
            width: 100px;
            height: 200px;
            background: red;
            position: absolute;
            left: -100px;
            top: 100px;
        }

        #div2 {
            width: 30px;
            height: 60px;
            position: absolute;
            right: -30px;
            top: 70px;
            background: black;
            color: white;
            text-align: center;
        }
    </style>
    <script>
        window.onload = function () {

            var oDiv = document.getElementById('div1');

            oDiv.onmouseover = function () {
                this.style.left = '0px';
            }

            oDiv.onmouseout = function () {
                this.style.left = '-100px';
            }

        }
    </script>
</head>

<body>
    <div id="div1">
        <div id="div2">分享到</div>
    </div>
</body>

</html>

image