如果文本框中包含某些内容,则文本验证不起作用

时间:2013-12-19 06:52:54

标签: javascript html textarea

我设置了一些javascript以确保表单中的所有字段都已填充。在大多数情况下它工作,空字段,错误消息。我的问题出现在textarea中有内容,我的表单已提交,即使其他字段可能为空。这是我目前的代码:

<!doctype html>
<html>
    <head>
        <title>Employment</title>
        <link href="../printstyles.css" rel="stylesheet" type="text/css" media="print" />
        <link href="../morlanslayout.css" rel="stylesheet" type="text/css" media="screen" />

            <script type="text/javascript">

                function validateForm()
                {
                    var x=document.forms["jobapp"]["firstname"].value;
                    var x=document.forms["jobapp"]["lastname"].value;
                    var x=document.forms["jobapp"]["address"].value;
                    var x=document.forms["jobapp"]["city"].value;
                    var x=document.forms["jobapp"]["planet"].value;
                    var x=document.forms["jobapp"]["system"].value;
                    var x=document.forms["jobapp"]["cluster"].value;
                    var x=document.forms["jobapp"]["phone"].value;
                    var x=document.forms["jobapp"]["email"].value;
                    var x=document.forms["jobapp"]["resume"].value;

                    if (x==null || x=="")
                    {
                        alert("All fields must be filled in");
                        return false;
                    }
                }

            </script>

    </head>
    <body class="container">

        <div class="container">

        <header> 
            <a href="#"><img src="../images/small-4128-598652.png" alt="Insert Logo Here" width="180" height="90" id="Insert_logo" /></a>
        </header>

        <div class="sidebar1">

        <aside>

            <a href="../morlansfamousshop.html" title="Homepage">Homepage</a><br />
            <a href="../wares/morlansfamouswares.html" title="Wares">Wares</a><br />
            <a href="../history/morlansfamoushistroy.html" title="Company History">Company History</a><br />
            <a href="../support/morlansfamoussupport.html" title="Support">Support</a><br />
            <a href="../employment/morlansfamousjobs.html" title="Employment">Employment</a><br />
            <a href="../contact/morlansfamouscontactinfo.html" title="Contact Page">Contact Us</a><br />


        </aside>

        </div><!--end sidebar1-->

        <article class="content">
            <section>           
                <h1>Employment</h1>
                <p>Are you interested in employment at Morlans Famous Shop?, if you answered yes, just fill out the following form and Morlan will check out your qualifications.</p>
            </section>
            <section>
                <form name="jobapp" action="../support/thankyou.html" onsubmit="return validateForm()" method="post">
                    <fieldset>
                        <legend>Mailing Address</legend>
                            <label class="label" for="firstname">First Name:</label>
                                <input class="input" type="text" name="firstname" id="firstname"  size="25" maxlength="25" />
                                <br />
                            <label class="label" for="lastname">Last Name:</label>
                                <input class="input" type="text" name="lastname" id="lastname"  size="25" maxlength="25" />
                                <br />
                            <label class="label" for="address">Address:</label>
                                <input class="input" type="text" name="address" id="address"  size="100" maxlength="100" />
                                <br />
                            <label class="label" for="city">City/Station:</label>
                                <input class="input" type="text" name="city" id="city"  size="50" maxlength="50" />
                                <br />
                            <label class="label" for="planet">Planet:</label>
                                <input class="input" type="text" name="planet" id="planet"  size="50" maxlength="50" />
                                <br />
                            <label class="label" for="system">System:</label>
                                <input class="input" type="text" name="system" id="system"  size="50" maxlength="50" />
                                <br />
                            <label class="label" for="cluster">Cluster:</label>
                                <input class="input" type="text" name="cluster" id="cluster"  size="50" maxlength="50" />
                                <br />
                            <label class="label" for="phone">Phone Number:</label>
                                <input class="input" type="text" name="phone" id="phone"  size="50" maxlength="50" />
                                <br />
                            <label class="label" for="email">E-mail:</label>
                                <input class="input" type="email" name="email" id="email" maxlength="35" placeholder="name@cmail.com"/>
                    </fieldset>

                    <fieldset>
                        <legend>Job Applies To (check all that apply)</legend>

                            <input type="checkbox" name="job" id="shipping" value="shipping" checked="checked"/>
                                <label for="shipping">Shipping</label>
                                <br />
                            <input type="checkbox" name="job" id="cashier" value="cashier" />
                                <label for="cashier">Cashier</label>
                                <br />
                            <input type="checkbox" name="job" id="security" value="security" />
                                <label for="security">Security</label>
                                <br />  
                    </fieldset>

                    <label for="resume">Paste Resume Here</label>
                        <br />
                        <textarea name="resume" id="resume" rows="10" cols="60" placeholder="Please enter your resume here."></textarea><!--end textareas on the same line that they start-->
                        <br />


                    <input type="submit" value="Submit" />
                    <input type="reset" value="Reset" />




            </section>

        </article>

        <footer>
          <p>This is an <a href="http://www.luzerne.edu" title="LCCC website" target="_blank">LCCC</a> project for <a href="http://cis.luzerne.edu/~ds0002/cis146/index" title="My website for CIS 146" target="_blank">CIS146</a></a></p>
        </footer>

        </div><!--end container-->

    </body>
</html>

任何帮助将不胜感激

4 个答案:

答案 0 :(得分:1)

首先创建值数组:

var x = {};

现在获取表单的所有值并将其推送到x。

x.push(document.forms["jobapp"]["firstname"].value);

现在使用循环验证

for(i in x){

    if(x[i] == null||x[i] ==""){

     alert("whatever you want to alert");
     return false;
}}

我还想告诉你,如果用户提供任何空间,x [i] ==“”将无效。所以使用x [i] .trim()==“”。

答案 1 :(得分:1)

您对所有字段使用相同的变量,因此,如果firstname或lastname为空,而next字段不为空,则变量不为null,因此您正在抑制验证

在每个字段使用if条件而不是在循环结束时使用一次

如下所示

<script type="text/javascript">

            function validateForm()
            {
                var x=document.forms["jobapp"]["firstname"].value;
                if (x==null || x=="")
                {
                    alert("firstname must be filled in");
                    return false;
                }
                x=document.forms["jobapp"]["lastname"].value;
               if (x==null || x=="")
                {
                    alert("lastname must be filled in");
                    return false;
                }
                ......
                ......
            }

        </script>

答案 2 :(得分:0)

每次说var x=someField时,您都在替换x。你想要做的是将每个变量分配给一个新变量,然后检查所有变量。您可以使用数组执行此操作。尝试这样的事情。

function validateForm(){
  var x = new Array();
  x.push(document.forms["jobapp"]["lastname"].value);
  x.push(document.forms["jobapp"]["address"].value);
  x.push(document.forms["jobapp"]["city"].value);
  x.push(document.forms["jobapp"]["planet"].value);
  x.push(document.forms["jobapp"]["system"].value);
  x.push(document.forms["jobapp"]["cluster"].value);
  x.push(document.forms["jobapp"]["phone"].value);
  x.push(document.forms["jobapp"]["email"].value);
  x.push(document.forms["jobapp"]["resume"].value);

  for(var i = 0; i < x.length; i++){
    if (x[i]==null || x[i]==""){
      alert("All fields must be filled in");
      return false;
    }
  }
}

上面的代码会针对您留空的每个字段提醒一次,因此它不是最好的,但它可以解决您的问题。

如果字段为空,您可能需要设置bool,并在测试每个字段后设置警报:

var fieldIsEmpty = false;
for(var i = 0; i < x.length; i++){
  if (x[i]==null || x[i]==""){
    fieldIsEmpty = true;
  }
}
if(fieldIsEmpty) {
  alert("All fields must be filled in");
  return false;
}

此外,警报可能会非常烦人。例如,如果您使用上面的第一个代码将每个字段留空。 console.log("All fields must be filled in")非常适合测试。

答案 3 :(得分:0)

您还可以修改以下代码以满足您的需求

function validateForm()
{
    var allFormElements = Array.prototype.slice.call( document.getElementsByTagName('input') ).concat (Array.prototype.slice.call( document.getElementsByTagName('textarea') ) );

    for (var i = 0; i < allFormElements.length; i++)
    {
        if (allFormElements[i].value == "")
        {
           alert("You must fill in all fields");
           return false;
        }
    }
}