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老师批语：
相册管理，主要是选择器的正确使用和before()，after()以及remove()的用法，实现了相册的添加，前移，后移以及删除功能。
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>相册管理</title> <link rel="stylesheet" type="text/css" href="css/style.css"> <script type="text/javascript" src="js/jquery.js"></script> <script type="text/javascript" src="js/demo.js"></script> </head> <body> <div class="wrap"> <div class="header"> <h2>相册管理</h2> <p> <label for="img_url">路径:</label> <input type="text" name="img_url" id="img_url" value ="images/jsy.jpg"> </p> <p>类型 : <input type="radio" id="rect" name="border" value="0" checked><label for="rect">直角</label> <input type="radio" id="radius" name="border" value="10%"><label for="radius">圆角</label> <input type="radio" id="circle" name="border" value="50%"><label for="circle">圆型</label> </p> <p>阴影: <select name="shadow"> <option value="0" selected>不添加</option> <option value="1">添加</option> </select> </p> <p><button class="add">添加图片</button></p> </div> <div class="main"> <ul></ul> </div> </div> </body> </html>
点击 "运行实例" 按钮查看在线实例
<script>
$(document).ready(function(){
$('button.add').on('click',function(){
var img_url = $('#img_url').val()
if (img_url.length==0) {
alert('请选择一张图片')
$('#img_url').focus()
return false
}
var img_type = $(':radio:checked').val()
var shadow = 'none'
if ($(':selected').val() == 1) {
shadow = '3px 3px 3px #666'
}
var img = $('<img>')
.prop('src',img_url)
.width(150)
.height(150)
.css({
'border-radius': img_type,
'box-shadow': shadow
})
var before = $('<button>').text('before')
var after = $('<button>').text('after')
var remove = $('<button>').text('delete')
var li = $('<li>').append(img,before,after,remove)
li.appendTo('ul')
before.click(function() {
$(this).parent().prev().before($(this).parent())
});
after.click(function() {
$(this).parent().next().after($(this).parent())
});
remove.click(function() {
$(this).parent().remove()
});
})
})
</script>点击 "运行实例" 按钮查看在线实例
.wrap {
width: 360px;
height: auto;
background-color: lightgray;
border: 1px solid #cecece;
color: #363636;
border-radius: 5px;
}
.wrap .header {
padding: 15px;
text-align: center;
}
.wrap .header h2 {
text-align: center;
}
.add {
width: 100px;
height: 30px;
border: none;
cursor: pointer;
background-color: #1E90FF;
border-radius: 3px;
color: white;
}
.add:hover {
opacity: 0.8;
}
.main {
overflow: hidden;
}
.main ul {
padding: 0;
margin: 0;
}
.main ul li {
list-style-type: none;
float: left;
margin-left: 20px;
margin-bottom: 10px;
width: 150px;
height: 200px;
text-align: center;
border-radius: 3px;
}
.main ul li button {
color: #fff;
margin:3px;
border: none;
border-radius: 3px;
background-color: #1E90FF;;
}
.main ul li button:hover {
background-color: orange;
color:white;
cursor: pointer;
}点击 "运行实例" 按钮查看在线实例
2.ajax的post请求
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Ajax</title>
<style type="text/css">
form{
width: 300px;
margin: auto;
}
</style>
</head>
<body>
<form action="login.php" method="post">
<fieldset>
<legend >login</legend>
<p>
<label for="email">email:</label>
<input type="email" id="email">
</p>
<p>
<label for="psd">passd:</label>
<input type="password" id="psd">
</p>
<p>
<button>login</button>
<span id="tips" style="font-size:1.2em;font-weight: bolder;color:red"></span>
</p>
</fieldset>
</form>
</body>
</html>
<script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>
<script type="text/javascript">
$('button:first').click (function(){
$.post(
'login.php',
{
"email":$('#email').val(),
"psd":$('#psd').val()
},
function(res){
if(res == 1 ){
$('#tips').text('success ...')
setTimeout(function(){
location.href = 'index.php'
},1500)
}else{
$('#tips').text('fail ...')
$('#email').focus()
setTimeout("$('#tips').empty()",1500)
}
},'json'
)
return false
})
</script>点击 "运行实例" 按钮查看在线实例
3.手写
总结：$.post(url,data,success,dataType)使用一个HTTP POST请求从服务器加载数据，其中url为post请求地址，data是发送的数据，success是请求成功后执行的回调函数,dataType是数据的格式，一般为json或xml格式，
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