通过javascript函数显示隐藏的部分

时间:2014-04-07 13:28:30

标签: javascript css html5 dom

我的HTML正文中有<h1>标记,我希望每次用户点击它时都会根据我在名为ShowIt()的javascript函数中定义的条件做出反应。第一次单击将显示隐藏部分,第二次单击将重新隐藏它,来回切换。但是,我无法让它发挥作用。

CSS:

*{
    margin:0;
    padding:0;
}

header,section,nav,aside,footer{
    display: block;
}

.wrapper{
    position: relative;
    width: 1000px;
    height: 4000px;
    margin: 0 auto;
}

#hid{
    background-color: #FF9;
    color: #000;
    font-size: 25px;
    font-family: Arial;
    width: 200px;
    height: 200px;
    position: absolute;
    top: 1200px;
    display:none;
}

h1{
    cursor: pointer;
    color: #000;
    font-size: 25px;
    font-family: Arial;
    position: absolute;
    top: 1150px;
}

HTML&amp; JS:

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <link rel="stylesheet" href="includes/style.css">
        <script src="includes/script.js"></script>
        <title>Some JS</title>

        <script>
            window.onload=function(){

                function ShowIt(){
                    var obj = document.getElementById("hid");
                    if(obj.style.display == "block")
                            obj.style.display = "none";
                    else
                            obj.style.display = "block";
                };
            }
        </script>

    </head>
    <body>
        <div class="wrapper">
            <section id="hid">hidden layer</section>
            <h1 onclick="ShowIt">click here</h1>
        </div>
    </body>
</html>

2 个答案:

答案 0 :(得分:2)

您在ShowIt函数中定义了window.onload函数,这不起作用,因为ShowIt的范围不是全局的。

 <script>

                function ShowIt(){
                    var obj = document.getElementById("hid");
                    if(obj.style.display == "block")
                            obj.style.display = "none";
                    else
                            obj.style.display = "block";
                };

        </script>



 <div class="wrapper">
            <section id="hid">hidden layer</section>
            <h1 onclick="ShowIt()">click here</h1>
        </div>

答案 1 :(得分:2)

您的功能应在window.onload之外宣布,否则您将获得范围问题。

                                        一些JS

    <script>
       function ShowIt(){
          var obj = document.getElementById("hid");
          if(obj.style.display == "block")
             obj.style.display = "none";
          else
             obj.style.display = "block";
       };
    </script>

</head>
<body>
    <div class="wrapper">
        <section id="hid">hidden layer</section>
        <h1 onclick="ShowIt()">click here</h1>
    </div>
</body>

要调用该功能,您需要执行以下操作:ShowIt()

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