Javascript onClick 功能无法正常工作

Question

    <!DOCTYPE html>
    <html>
        <head>
            <title> Delete Paper </title>
        </head>
        <body>
            <script>
                    document.write('<?php 
                        session_start();
                        $username = "";
                        $password = "";
                        $server = "localhost";
                        $user = "";
                        $pass = "";
                        $db = "test";
                        $userid = $_SESSION['userid'];


                        $conn = new mysqli($server,$user,$pass, $db);
                        $sql = "SELECT * FROM questionpapercount where userid='$userid'";
                        $result = $conn->query($sql);

                        while($row = $result->fetch_assoc()){
                            $paper = $row['paperid'];
                            echo "<input type=checkbox name=$paper /> $paper ";
                        }

                        $conn->close();

                     ?> ');
                    function deletequery(){
                        alert('abcd');
                    }
                </script>
            <input type=button value=Delete onclick=deletequery() />
        </body>
    </html>

My javascript function is not working properly.我的 javascript 功能无法正常工作。 If i write onclick a simple alert('abcd');如果我写 onclick 一个简单的 alert('abcd'); then it is working fine, but if i write a function instead then it is not working.那么它工作正常，但如果我写一个函数，那么它就不起作用了。

Answer 1

delete is a operator in JavaScript, so these lines won't work: delete是JavaScript 中的运算符，因此这些行不起作用：

function delete(){
    alert('abcd');
}

document.write("<input type=button value=Delete onclick=delete(); />");

Rename your function to fix your code.重命名您的函数以修复您的代码。 You should also put your HTML attributes in quotes:您还应该将 HTML 属性放在引号中：

function deleteHandler(){
    alert('abcd');
}

document.write('<input type="button" value="Delete" onclick="deleteHandler();" />');

Answer 2

Delete 是一个关键字，因此您可以使用“del”或其他名称来代替 delete。

Javascript onClick 功能无法正常工作

问题描述

2 个解决方案

解决方案1
0 2015-10-21 06:58:19

解决方案2
-1 2015-10-21 06:22:26

Javascript onClick 功能无法正常工作

问题描述

2 个解决方案

解决方案1 0 2015-10-21 06:58:19

解决方案2 -1 2015-10-21 06:22:26

解决方案1
0 2015-10-21 06:58:19

解决方案2
-1 2015-10-21 06:22:26