博客列表 >js明星照片,迷你计算器——2018年3月30日12时45分

js明星照片,迷你计算器——2018年3月30日12时45分

沈斌的博客
沈斌的博客原创
2018年03月30日 13:07:54838浏览

明星照片:

通过<a></a>设置onclick,用js实现onclick功能


实例

<!DOCTYPE html>
<html lang="en" >
    <head>
        <meta charset="utf-8">
        <title>starts photo</title>
        <style type="text/css">
            .top {
                width: 600px;
                height: 700px;
                margin: 20px auto;
                text-align: center;
                border: 2px solid lightgreen;
                background-color: lightblue;
            }
            .menu {
                width: 100%;
                margin: auto;
                overflow: hidden;
            }
            .starts  {
                margin: 0;
                padding: 0;
                overflow: hidden;
				display:inline-block;
            }

            .starts  li {

                list-style-type: none;
                float: left;
                background-color: skyblue;
                color: white;
				text-align:center;
				margin:0 20px;
                border: 1px solid black;

            }
            .starts li a {
                display: block;
                width: 100px;
                height: 40px;
                text-align: center;
                line-height: 40px;
                text-decoration: none;

            }

            .starts li:hover {
                background-color: coral;
            }
            .pic {
                width: 600px;
                height: 550px;
                border: 1px solid black;
                vertical-align: top;
                margin: auto;
                margin-top: 30px;
            }

            .pic img {
                width: 100%;
                height: 100%;
            }
        </style>
    </head>
    <body>
        <div class="top">
            <h2>明星相册</h2>
                <ul class="starts">
                    <li><a href="./img/zly.jpg" title="《楚乔传》,《花千骨》,《陆贞传奇》..." onclick="show(this);return false">赵丽颖</a></li>
                    <li><a href="./img/gyy.jpg" title="《倚天屠龙记》,《咱们经婚吧》,《爱无悔》..." onclick="show(this);return false">高圆圆</a></li>
                    <li><a href="./img/sl.jpg" title="《那年花开月正圆》,《甑环传》,《玉观音》..." onclick="show(this);return false">孙俪</a></li>
                    <li><a href="./img/fbb.jpg" title="《还珠格格》,《武媚娘传奇》,《我不是潘金莲》..." onclick="show(this);return false">范冰冰</a></li>
                </ul>

            <div class="pic">
                <img src="./img/zwt.png" alt="" id="img">
            </div>
            <p id="intro"></p>

        </div>

        <script type="text/javascript">
            function show(pic) {
                var picUrl=pic.href;
                var picInfo=pic.title;
                var picName=pic.innerHTML;

                var img=document.getElementById('img');
                var p=document.getElementById('intro');

                img.src=picUrl;
                p.innerHTML='<span style="color:wheat">'+picName+':'+picInfo +'</span>';

            }
        </script>
    </body>
</html>

运行实例 »

点击 "运行实例" 按钮查看在线实例

迷你计算器:

通过input控件实现输入,按钮设置计算,通过document get 方法得到html 控件


实例

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>caculator</title>
        <style type="text/css">
            .caculator {
                width: 600px;
                height: 200px;
                background-color: #efefef;
                border: 1px solid lightgrey;
                text-align: center;
                margin: auto;
                margin: 20px auto;
                color: #636364;
                border-radius: 10px;
                box-shadow: 3px 3px 3px #888;
            }
            table {
                margin: auto;

            }

            td {
                width: 100px;
                height: 30px;
                padding: 5px 10px;
            }

            input,select {
                width: 100%;
                height: 100%;
                border: none;
                text-align: center;
            }

            button {
                width:100%;
                height: 100%;
                border: none;
                background-color: lightgreen;
                color: white;
            }

            button:hover {
                cursor: pointer;
                background-color: lightskyblue;
                width: 106%;
                height: 106%;
            }
        </style>


    </head>
    <body>
        <div class="caculator">
            <h2>迷你计算器</h2>
            <form class="" action="index.html" method="post">
                <table>
                    <tr>
                        <td><input type="text" name="opt1" placeholder="操作数1"></td>
                        <td>
                            <select class="" name="option">
                                <option value="null">选择操作符</option>
                                <option value="add">+</option>
                                <option value="sub">-</option>
                                <option value="mul">*</option>
                                <option value="div">/</option>
                            </select>
                        </td>
                        <td>
                            <input type="text" name="opt2" value="" placeholder="操作数2">
                        </td>
                        <td>
                            <button type="button" name="button">计算</button>
                        </td>
                    </tr>
                    <tr>
                        <td colspan="2" align="right"><h3>结果:</h3></td>
                        <td colspan="2" align="left">
                            <h3 id="placeholder"></h3>
                        </td>
                    </tr>
                </table>
            </form>
        </div>

        <script type="text/javascript">
            var opt1=document.getElementsByName('opt1')[0];
            var opt2=document.getElementsByName('opt2')[0];
            var opt=document.getElementsByName('option')[0];

            var btn=document.getElementsByTagName('button')[0];
            var placeholder=document.getElementById('placeholder');

            btn.onclick=function(){
                if (opt1.value.length == 0) {
                    alert('opt1 为空');
                    opt1.focus();
                    return false;
                } else if (isNaN(opt1.value)) {
                    alert('opt1是数字');
                    opt1.focus();
                    return false;
                } else if (opt2.value.length == 0) {
                    alert('opt2 为空');
                    opt1.focus();
                    return false;
                } else if (isNaN(opt2.value)) {
                    alert('opt2是数字');
                    opt1.focus();
                    return false;
                } else {
                    var data1=parseFloat(opt1.value);
                    var data2=parseFloat(opt2.value);
                }

                var option=opt.value;
                var temp=0;
                var flag="";
                var result="";

                switch (option) {
                    case 'null':
                        alert('option not select');
                        opt.focus();
                        return false;
                    case 'add':
                        flag='+';
                        temp=data1+data2;
                        break;
                    case 'sub':
                        flag='-';
                        temp=data1-data2;
                        break;
                    case 'mul':
                        flag='*';
                        temp=data1*data2;
                        break;
                    case 'div':
                        flag='/';
                        if (data2 == 0){
                            aleart("除数不能为0");
                            opt2.focus();
                            return false;
                        } else {

                            temp=data1/data2;
                        }
                        break;
                }

                var str='<span style="color:green">';
                str+=data1+' '+flag+' '+data2+'='+temp;
                str+='</span>';
                placeholder.innerHTML=str;
            }
        </script>

    </body>
</html>

运行实例 »

点击 "运行实例" 按钮查看在线实例

手抄:

cal1.jpg

cal2.jpg

小结:

js代码设置a标签的onclick,再通过js function实现点击后的具体功能。

document 各种get 方法获得html中的控件,并通过赋值实现控件内容的更新

stars.png

caculator.png

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