中间出错无数，常出错的地方：拼写错误，缺少标点，代码位置放错
相册实例--->电子产品报价单实例：
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>相册</title>
<style type="text/css">
.price {
width: 550px;
height: 750px;
margin:auto;
text-align: center;
background-color: lightgray;
}
.price h2 {
width: 100%;
height: 50px;
line-height: 50px;
color:black;
margin:0;
padding: 0;
}
.price ul {
width: 100%;
height: 50px;
margin:0;
padding: 0;
overflow: hidden;
}
.price ul li {
list-style-type: none;
width:70px;
height: 30px;
float: left;
margin:5px 15px;
background-color: gray;
border-radius:3px;
box-shadow:1px 1px 3px 1px lightgray;
}
.price ul li a{
color:white;
line-height: 30px;
text-decoration-line:none;
font-size: 0.9em;
}
.price ul li:hover {
background-color: black;
}
.price img {
width: 500px;
height: 550px;
margin: auto;
background-color: black;
border: 1px dotted gray;
}
.price p {
text-align: left;
margin-left:30px;
}
</style>
</head>
<body>
<div class="price">
<h2>电子产品报价单</h2>
<ul>
<li>
<a href="../images/ipad.png" title="2599" onclick="chPic(this);return false;">ipad</a>
</li>
<li>
<a href="../images/ip6s.jpg" title="3599" onclick="chPic(this);return false;">iphone6s</a>
</li>
<li>
<a href="../images/mac.png" title="7899" onclick="chPic(this);return false;">mac</a>
</li>
<li>
<a href="../images/mate.png" title="5499" onclick="chPic(this);return false;">mate</a>
</li>
</ul>
<hr>
<img src="../images/ipx.png" alt="" id="pic">
<p id="priceInfo" >您所选择的产品价格为</p>
</div>
<script type="text/javascript">
function chPic(phone) {
var phonePic = phone.href
var phonePrice = phone.title
var phoneName = phone.innerHTML
// alert(phonePrice)
var img = document.getElementById('pic')
var p = document.getElementById('priceInfo')
img.src = phonePic
p.innerHTML = phoneName + '<span>价格为:</span>' + phonePrice
}
</script>
</body>
</html>点击 "运行实例" 按钮查看在线实例
迷你计算器实例--->无格式丑陋的计算器
先不写样式了，以后有时间再改
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>计算器</title>
</head>
<body>
<form>
<table>
<tr>
<td>
<input type="text" name="nub1" value="" placeholder="请输入第一个数字">
</td>
<td>
<select name="opt">
<option value="null">请选择计算方法</option>
<option value="add">+</option>
<option value="sub">-</option>
<option value="mul">*</option>
<option value="div">/</option>
</select>
</td>
<td>
<input type="text" name="nub2" value="" placeholder="请输入第二个数字">
</td>
<td><button type="button">计算</button></td>
</tr>
<tr>
<td colspan="2"><h3>结果:</h3></td>
<td colspan="2"><h3 id="placeholder"></h3></td>
<td></td>
<td></td>
</tr>
</table>
</form>
<script type="text/javascript">
var nub1 = document.getElementsByName('nub1')[0]
var nub2 = document.getElementsByName('nub2')[0]
var math = document.getElementsByName('opt')[0]
var btn = document.getElementsByTagName('button')[0]
var placeholder = document.getElementById('placeholder')
btn.onclick = function(){
if (nub1.value.length == 0) {
alert('请填入第一个数字')
nub1.focus()
return false
} else if (isNaN(nub1.value)){
alert('第一个数字:非法数据')
nub1.focus()
return false
} else if (nub2.value.length == 0) {
alert('请填入第二个数字')
nub2.focus()
return false
} else if (isNaN(nub2.value)){
alert('第二个数字:非法数据')
nub2.focus()
return false
} else {
var date1 = parseFloat(nub1.value)
var date2 = parseFloat(nub2.value)
}
var option = math.value
var temp = 0
var flag = ''
switch (option) {
case 'null':
alert('请选择计算方法')
math.focus()
return false
case 'add':
flag = '+'
temp = date1 + date2
break
case 'sub':
flag = '-'
temp = date1 - date2
break
case 'mul':
flag = '*'
temp = date1 * date2
break
case 'div':
flag = '/'
if (date2 == 0) {
alert('除数不能为0')
return false
}else{
temp = date1 / date2
}
break
}
var str = '<span style="color:red">'
str += date1 + flag + date2+ '=' + temp
str += '</span>'
placeholder.innerHTML = str
}
</script>
</body>
</html>点击 "运行实例" 按钮查看在线实例
手抄代码
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