input失去焦点和获得焦点jquery焦点事件 

 1 <html xmlns="http://www.w3.org/1999/xhtml">
 2 <head>
 3 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 4 <title>input失去焦点和获得焦点jquery焦点事件插件 - 懒人建站</title>
 5 <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js" type="text/javascript"></script>
 6 <script type="text/javascript">
 7 $(document).ready(function(){
 8 //focusblur
 9     jQuery.focusblur = function(focusid) {
10 var focusblurid = $(focusid);
11 var defval = focusblurid.val();
12         focusblurid.focus(function(){
13 var thisval = $(this).val();
14 if(thisval==defval){
15                 $(this).val("");
16             }
17         });
18         focusblurid.blur(function(){
19 var thisval = $(this).val();
20 if(thisval==""){
21                 $(this).val(defval);
22             }
23         });
24         
25     };
26 /*下面是调用方法*/
27     $.focusblur("#searchkey");
28 });
29 </script>
30 </head>
31 
32 <body>
33 <form action="" method="post">
34 <input name="" type="text" value="输入搜索关键词" id="searchkey"/>
35 <input name="" type="submit" id="searchbtn" value="搜索"/>
36 </form>
37 <p>input失去焦点和获得焦点jquery焦点事件插件，<br/><strong style="color:#F00">鼠标在搜索框中点击的时候里面的文字就消失了</strong>。</p>
38 
39 </body>
40 </html>

文章来自懒人建站:http://www.51xuediannao.com/js/jquery/jquery_focusblur.html

posted @ 2013-07-22 16:51  Mr.Thanks  阅读(520)  评论(0)    收藏  举报