Javascript 表单使用的onsubmit函数未定义_Javascript_Html_Forms_Function_Onsubmit

Javascript 表单使用的onsubmit函数未定义

javascript html forms function

Javascript 表单使用的onsubmit函数未定义,javascript,html,forms,function,onsubmit,Javascript,Html,Forms,Function,Onsubmit,我想验证我的表单，并使用onsubmit创建了一个formValidation函数，该函数调用js.js文件中的函数。但是，当我单击“提交”时，会出现以下错误： <head> <meta charset="utf-8" /> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>Page Title</title> </head>

我想验证我的表单，并使用onsubmit创建了一个formValidation函数，该函数调用js.js文件中的函数。但是，当我单击“提交”时，会出现以下错误：

<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>Page Title</title>

</head>

<body>
    <script>
        function validateForm() {
            console.log("hellloooooo this is working");
        }
    </script>
    <form id="callback" class="popup-form" method="post" onsubmit="return validateForm()">
        // Form content
        <input type="Submit">
    </form>

</body>

</html>

以下是必要的表格代码：

 <form action="send-email.php" id="callback" class="popup-form" method="post" onsubmit="return validateForm()">
 // Form content
</form>

<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>Page Title</title>

</head>

<body>
    <script>
        function validateForm() {
            console.log("hellloooooo this is working");
        }
    </script>
    <form id="callback" class="popup-form" method="post" onsubmit="return validateForm()">
        // Form content
        <input type="Submit">
    </form>

</body>

</html>

脚本标记在body标记中，因此它应该可以工作。。我哪里出错了？？？

您应该确保表单标记上方的脚本标记似乎正常工作。这里没有任何问题

<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>Page Title</title>

</head>

<body>
    <script>
        function validateForm() {
            console.log("hellloooooo this is working");
        }
    </script>
    <form id="callback" class="popup-form" method="post" onsubmit="return validateForm()">
        // Form content
        <input type="Submit">
    </form>

</body>

</html>

<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>Page Title</title>

</head>

<body>
    <script>
        function validateForm() {
            console.log("hellloooooo this is working");
        }
    </script>
    <form id="callback" class="popup-form" method="post" onsubmit="return validateForm()">
        // Form content
        <input type="Submit">
    </form>

</body>

</html>

请在表单中使用输入类型='submit'。它也可以在java脚本中工作

<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>Page Title</title>

</head>

<body>
    <script>
        function validateForm() {
            console.log("hellloooooo this is working");
        }
    </script>
    <form id="callback" class="popup-form" method="post" onsubmit="return validateForm()">
        // Form content
        <input type="Submit">
    </form>

</body>

</html>

在下面的表格中添加提交输入

<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>Page Title</title>

</head>

<body>
    <script>
        function validateForm() {
            console.log("hellloooooo this is working");
        }
    </script>
    <form id="callback" class="popup-form" method="post" onsubmit="return validateForm()">
        // Form content
        <input type="Submit">
    </form>

</body>

</html>

<form action="send-email.php" id="callback" class="popup-form" method="post" onsubmit="return validateForm()"><input type="submit">
</form>

用java脚本编写验证函数，如下所示

<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>Page Title</title>

</head>

<body>
    <script>
        function validateForm() {
            console.log("hellloooooo this is working");
        }
    </script>
    <form id="callback" class="popup-form" method="post" onsubmit="return validateForm()">
        // Form content
        <input type="Submit">
    </form>

</body>

</html>

<script type="text/javascript">
  function validateForm(){
    console.log('ddd');
    return false;
  }
</script>

请发布完整的HTML代码。联机处理程序只能找到全局函数。@Teemu-right，my-bad。。。远离的。