字段的占位符文本 

<!doctype html>
<html>
  <head>
    <meta charset="utf-8">
    <title>搜索框占位符文本</title>
    <style type="text/css">
*{font-size:12px;}
#switcher input{height:26px;width:200px;}
.overlabel{position:raletive;}
.overlabel label{position:absolute;top:16px;left:16px;}
    
    </style>
    <script src="./jquery.js"></script>
<script type="text/javascript">


$(function(){
    var $search=$("#search").addClass("overlabel");//虽然是给变量赋值，但是已经执行了，同时，其实执行完毕还是它本身
    var $searchInput=$search.find("input");
    var $searchLabel=$search.find("label");
    if($searchInput.val()){
        $searchLabel.hide();
    }
    $searchInput.focus(function(){
        $searchLabel.hide();
    })
    .blur(function(){
        if($searchInput.val()==''){
        $searchLabel.show();
        }
    });
    $searchLabel.click(function(){
        $searchInput.trigger("focus");
    });
});

</script>
  </head>
  
  <body>
<div id="switcher">
<form id="search" method="" action="" >
<label>字段的占位符文本</label>
<input type="text" value="" id="txt" maxlength="150" name="txtname" />
</div>
</body>
</html>

 

posted @ 2014-07-02 21:43  充实地生活着  阅读(578)  评论(0)    收藏  举报