标签中获得鼠标与否的样式变化——js实现

时间：2023-03-09 02:34:02
<input>标签中获得鼠标与否的样式变化——js实现 
<!DOCTYPE html>

<html>

<head lang="zh">

    <meta http-equiv="X-UA-Compatible" content="IE=edge">

    <meta charset="utf-8" />

    <meta content="yes" name="apple-mobile-web-app-capable"/>

    <meta content="yes" name="apple-touch-fullscreen"/>

    <meta content="telephone=no" name="format-detection"/>

    <meta content="black" name="apple-mobile-web-app-status-bar-style">

    <meta content="#ffffff" name="msapplication-TileColor" />

    <meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0" name="viewport" />

    <title>采销商品基本信息</title>

    <link rel="stylesheet" href="css/index.css"/>

</head>

<body>

<div class="pox">

    佛得角粉丝卡<span>jkladja</span>放到那送到哪

</div>

<div class="pox-1">

    佛得角粉丝卡<span>jkladja</span>放到那送到哪<input class="pox-text" type="text" name="" value="hello">

</div>

<script type="text/javascript" src="./js/jquery.js"></script>

<script type="text/javascript">

    $("input").focus(function(){

         var aa=$(this).val();

         var bb=$(this)[0].defaultValue;

         if(aa==bb){

            $(this).val("");

         }

    });

     $("input").blur(function(){

         var aa=$(this).val();

         var bb=$(this)[0].defaultValue;

         if(aa==""){

            $(this).val(bb);

         }

    });

</script>

</body>

</html>

注意的是defaultValue是js原生态的属性！要使用$(this)[0].defaultVaue