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JS 表单验证

日期：2018-10-08点击：587收藏

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>表单验证</title>
</head>
<body>

<form name="myform" action="" onsubmit="return validateform()" method="post">
    name:<input type="text" name="name"><br>
    <input type="submit" value="提交">
</form>

<script type="text/javascript">
    function validateform() {
        var x=document.forms["myform"]["name"].value;
        if (x==null || x==""){
            alert("name必须填写！");
            return false;
        }
    }
</script>
</body>
</html>