Question

我在密码表单上提供验证功能。我需要能够实现一些验证规则，并在提交时对它们进行全部检查。现在对我来说代码是合理的，但我认为我的代码中可能存在一些逻辑错误，我太累了，不能注意到（咖啡机也是如此！）

这是JavaScript：

<script type="text/javascript">
<!--
    function validate(registerForm)
    registerForm.onsubmit=function()
    {
        var pw1 = document.forms["register"]["password1"].value;
        var pw2 = document.forms["register"]["password2"].value;

        //Check values are present in both fields
        if(pw1 == '' || pw2 == '')
        {
            alert("Please enter your password twice.");
            return false;
        }
        //Check there no spaces
        else if(document.forms["register"]["password1"].value.indexOf(invalid) > - 1) 
        {
            alert("Spaces are not allowed in passwords!");
            return false;
        }
        //Check passwords are the same
        else
        {
            if(pw1 != pw2) 
            {
                alert("The passwords you entered were not the same. Please try again!");
                return false;
            }
            //Accept passwords
            {
                alert("Password accepted!");
                return true;
            }
        }
    }
-->
</script>

与HTML表单一起使用：

<form id="register">
    <label for="username">Username</label>
    <input type="text" class="input_text" name="username" id="name" placeholder="e.g. AberLibrary01" />
    <br />
    <label for="password">Password</label> 
    <input type="text" class="input_text" name="password1" id="password1" placeholder="e.g. aber01" />
    <br />
    <label for="re-enterpassword">Re-enter password</label>
    <input type="text" class="input_text" name="password2" id="password2" placeholder="e.g. aber01" />

    <input type="submit" class="button" value="Register" />
    </form>

    <script type="text/javascript">
    <!--
        new validate(document.forms['register']);
    -->
    </script>

可爱的StackOverflow社区的任何想法？确切的问题是它不会检查密码中的空格或输入的两个密码是否相同。它成功检查两个密码字段中是否至少存在某些内容。

谢谢Dan

Answer 1

这一行：

else if(document.forms["register"]["password1"].value.indexOf(invalid) > - 1)

invalid未定义，我怀疑这会导致您遇到的问题。

Answer 2

对代码进行了更改，使其正常运行http://jsbin.com/igonec/edit#preview

错误

使用var pw1 = document.forms [“register”] [“password1”]。它导致了错误
想念别人。
使用无效而非“”。
错误使用括号。

我省略了你的错误，使解决方案更加优雅。

Javascipt

    function validate()
     {
        var pw1 = document.getElementById("password1").value;
        var pw2 = document.getElementById("password2").value;

        //Check values are present in both fields
        if(pw1 ==='' || pw2 === '')
        {
            alert("Please enter your password twice.");
            return false;
        }
        //Check there no spaces
        else if(document.getElementById("password1").value.indexOf(" ") > - 1) 
        {
            alert("Spaces are not allowed in passwords!");
            return false;
        }
        //Check passwords are the same
        else
        {
            if(pw1 !== pw2) 
            {
                alert("The passwords you entered were not the same. Please try again!");
                return false;
            }
            else
            {
                alert("Password accepted!");
                return true;
            }
        }

    }

HTML

<form id="register">
    <label for="username">Username</label>
    <input type="text" class="input_text" name="username" id="name" placeholder="e.g. AberLibrary01" />
    <br />
    <label for="password">Password</label> 
    <input type="text" class="input_text" name="password1" id="password1" placeholder="e.g. aber01" />
    <br />
    <label for="re-enterpassword">Re-enter password</label>
    <input type="text" class="input_text" name="password2" id="password2" placeholder="e.g. aber01" />

    <input type="submit" class="button" onclick="validate()" value="Register" />
    </form>

多次验证检查 - 逻辑错误

2 个答案: