Question

Form Validation

Asked by: Exceter

I've been attempting to validate my forms with the code I found here,
http://www.javascript-coder.com/html-form/javascript-form-validation.phtml

This works perfectly if I use a standard html <input type="submit"... However, if javascript is disabled in the client's browser, this would allow the form to be submitted without being validated. I want to submit the form with a button that does nothing without javascript. That way, if the client had javascript disabled, they can't submit the form. I've succeeded in getting the form to submit using,
<button type = "button" name = "bsubmit" onClick="document.getElementById('test').submit();">Submit</button>
where test is the name of the form. This submits the form but the validation routines are not called. How can I use javascript to call the validator before the form is submitted?

Cheers!
Exceter

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Asked On
2007-02-20 at 05:40:26ID22400751
Tags

validation

,

javascript

,

form

Topic

JavaScript

Participating Experts
3
Points
500
Comments
7

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Answers

 

by: mark-bPosted on 2007-02-20 at 05:50:59ID: 18570287

Assuming your validator is called 'frmvalidator', then try this:

<button type = "button" name = "bsubmit" onClick="if (frmvalidator.form_submit_handler() ) document.getElementById('test').submit();">Submit</button>

-Mark

 

by: SteggsPosted on 2007-02-20 at 05:56:00ID: 18570334

Hi Exceter,

Could you put the document.getElementById('test').submit(); in an else at the end of your validation code?

onclick="validateForm()"

function validateForm() {
if () {do this}
ETC ETC
else {document.getElementById('test').submit()}
}

Cheers

 

by: ExceterPosted on 2007-02-20 at 06:00:06ID: 18570372

Mark, I tried your suggestions and the JavaScript console in Firefox spit this back at me,
Error: frmvalidator.form_submit_handler is not a function
Source File: http://www.msivt.com/zeus20/test/test.php?fname=&mname=&lname=
Line: 1

Steggs, that was my original thought too. However, my javascript experience is limited and I'm not entirely sure how to invoke the validator programatically.

 

by: mark-bPosted on 2007-02-20 at 06:17:38ID: 18570494

It should be fairly easy to figure out if I can see the HTML source.  Would it be possible to post it?

 

by: ExceterPosted on 2007-02-20 at 06:23:01ID: 18570538

Some of this will be very ugly. I'm working on a form generator using PHP and I wanted it to automatically spit out validation code as well as the form. The resulting HTML is typically a mess.

<html>
      <head>
            <title>Testing</title>
            <script language="javascript" src="../lib/confirm_pop.js"></script>
            <link type="text/css" rel="stylesheet" href="../lib/css.css">
            <script language="JavaScript" src="../lib/javascript/validator/gen_validatorv2.js" type="text/javascript"></script>
      </head>

      
      <body style = "background-image: url('http://www.msivt.com/images/back.gif'); background-repeat: no-repeat; background-attachment: fixed;">
            <table width="100%" height="100%" border="0">
                  <tr>
                        <td align="center" valign="top">
                              <table class="main-table" style="position:relative;">
                                    <tr>
                                          <td bgcolor="#ffffff">
                                                <table cellspacing="0" cellpadding="0" width="100%">
                                                      <tr>

                                                            <td width="50%">
                                                                  <div align="left" class="h5">Manufacturing Solutions, Inc.</div>
                                                            </td>
                                                            <td width="50%" align="right">
                                                            
                                                                                                                        
                                                            <a href="../admin.php">[Admin]</a>
                                                            
                                                                                                                        
                                                                  <a href="../main.php">[ Dashboard ]</a>
                                                                  <a href="../log_out.php?log_out=yes">[ Log Out ]</a>

                                                            </td>
                                                      </tr>
                                                      <tr>
                                                            <td style = "font-style: italic; text-align: left;">
                                                                  Tuesday February 20, 2007 9:18:45 AM                                                            </td>
                                                      </tr>
                                                      <tr>
                                                            <td colspan="2">

                                                                  <div align="center" class="h1">Testing</div>
                                                                  <div align="center">
            <a href="century/main.php">[ Century ]</a>
            <a href="quality/module/index.php">[ Quality ]</a>
            <a href="inventory/index.php">[ Inventory ]</a>
            <a href="communication/index.php">[ Communication ]</a>

            <a href="hr/index.php">[ Human Resources ]</a>
            <a href="preferences.php">[ Preferences ]</a></div>
                                                            </td>
                                                      </tr>
                                                      <tr>
                                                            <td colspan="2">
                                                                  <div align="center" class=""></div><br>
                                                            </td>

                                                      </tr>
                                                      <tr>
                                                            <td align="center" colspan="2" style="vertical-align:top;"><form id = "test" name = "test" action="test.php" method = "get"><table><tr><td><label for = "fname">First Name</label></td><td><input type = "text" name = "fname" value = "" ></td><td><label for = "mname">Middle Name</label></td><td><input type = "text" name = "mname" value = "" ></td></tr><tr><td><label for = "lname">Last Name</label></td><td><input type = "text" name = "lname" value = "" ></td></tr></table><button type = "button" name = "bsubmit" onClick="document.getElementById('test').submit();">Submit</button><script language="JavaScript"> var frmvalidator  = new Validator("test");frmvalidator.addValidation("fname","req","First Name is required." );frmvalidator.addValidation("mname","alpha","Middle Name only accepts letters from the alphabet." );frmvalidator.addValidation("lname","req","Last Name is required." );</script><br /><button type = "button" name = "bsubmit" onClick="if (frmvalidator.form_submit_handler() ) document.getElementById('test').submit();">Submit</button>                        </td>
                  </tr>
            </table>

            <br>
            <table class="main-table">
                  <tr>
                        <td bgcolor="#ffffff">
                              <table cellspacing="0" cellpadding="0" width="100%">
                                    <tr>
                                          <td>
                                                                                                <div align="left" class="fineprint">
                                                      Page Execution Time: 0.017 Seconds<br>

                                                      Query Timestamp: 2007/02/20 09:18:45<br>
                                                      User: DunlapJ<br>
                                                </div>
                                          </td>
                                          <td>
                                                <div align="right" class="fineprint">
                                                      Permission: general<br>

                                                      Page Version: [ v2.5.07.02.20.08 ]<br>
                                                      IP Address: 10.150.199.117<br>
                                                </div>
                                          </td>
                                    </tr>
                              </table>
                        </td>
                  </tr>

            </table>
      </body>
</html>

 

by: mplungjanPosted on 2007-02-20 at 06:27:05ID: 18570571

try changing
function form_submit_handler()
{
      for(var itr=0;itr < this.elements.length;itr++)
      {
            if(this.elements[itr].validationset &&
         !this.elements[itr].validationset.validate())
            {
              return false;
            }
      }
      if(this.addnlvalidation)
      {
        str =" var ret = "+this.addnlvalidation+"()";
        eval(str);
    if(!ret) return ret;
      }
      return true;
}
to

function form_submit_handler(theForm)
{
      for(var itr=0;itr < theForm.elements.length;itr++)
      {
            if(theForm.elements[itr].validationset &&
         !theForm.elements[itr].validationset.validate())
            {
              return false;
            }
      }
      if(theForm.addnlvalidation)
      {
        str =" var ret = "+theForm.addnlvalidation+"()";
        eval(str);
    if(!ret) return ret;
      }
      return true;
}


and use

<input type="button" onClick="if (form_submit_handler(this.form)) this.form.submit()" value="SUBMIT">

Michel

 

by: ExceterPosted on 2007-02-20 at 06:30:18ID: 18570601

Thanks!

20120131-EE-VQP-002

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