直接上代码

 <<!DOCTYPE HTML><html>  <head>    <link href="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.2.2/css/bootstrap-combined.min.css" rel="stylesheet">    <link rel="stylesheet" type="text/css" media="screen"     href="http://tarruda.github.com/bootstrap-datetimepicker/assets/css/bootstrap-datetimepicker.min.css">  </head>  <body>    <div id="datetimepicker" class="input-append date">      <input type="text" id="w3s"></input>      <span class="add-on">        <i data-time-icon="icon-time" data-date-icon="icon-calendar"></i>      </span>    </div>    <script type="text/javascript"     class="lazyload" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC" data-original="http://cdnjs.cloudflare.com/ajax/libs/jquery/1.8.3/jquery.min.js">    </script>     <script type="text/javascript"     class="lazyload" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC" data-original="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.2.2/js/bootstrap.min.js">    </script>    <script type="text/javascript"     class="lazyload" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC" data-original="http://tarruda.github.com/bootstrap-datetimepicker/assets/js/bootstrap-datetimepicker.min.js">    </script>    <script type="text/javascript"     class="lazyload" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC" data-original="http://tarruda.github.com/bootstrap-datetimepicker/assets/js/bootstrap-datetimepicker.pt-BR.js">    </script>    <script type="text/javascript">      $('#datetimepicker').datetimepicker({        format: 'yyyy-MM-dd hh:mm:ss'              });    </script>  <script> $(document).ready(function(){  $("button").click(function(){      var time= $("#w3s").attr("value");   if(time != ""){    alert(time);   }  }); }); </script>    <button>get time value</button>  </body><html>