定时显示隐藏

 1 <script type="text/javascript">
 2     function close2(){
 3         // $('#a').css('display','none');
 4         $('#a').hide();
 5         // alert('message');
 6     }
 7     function xianshi2(){
 8         $('#a').css('display','block');
 9     }
10     setInterval('xianshi2()',10000);
11 </script>
12 <div id='a' style="position:fixed;bottom:30px;left:20px;display:none;">
13     <div style="text-align:right;">
14         <a href="javascript:void(0);" onclick="close2()" ><img src="images/001-1.png" alt="" /></a>
15     </div>
16     <img src="images/002.png" alt="" />
17 </div>