模拟输入框或文本框placeholder效果
##用法
- 在头部引入css文件
<link rel="stylesheet" href="your path/placeholder.css" />
- 引入jquery库和placeholder js文件
<script type="text/javascript" src="your path/jquery.js" ></script>
<script type="text/javascript" src="your path/calendar.js" ></script>
- html结构
<form>
<div class="placeholder-wrap">
<label class="placeholder js-placeholder">Email</label>
<input class="input" type="text" placeholder="Email" />
</div>
<div class="placeholder-wrap">
<label class="placeholder js-placeholder">Password</label>
<input class="input" type="password" placeholder="Password" />
</div>
<div class="placeholder-wrap">
<label class="placeholder js-placeholder">Textarea</label>
<textarea class="textarea" placeholder="Textarea"></textarea>
</div>
</form>