Question

onChange & submit

Asked by: jmingo

i want to submit a form when i select something in a select box. that's not a problem.

what the problem is, that i don't want it to submit the form, if the user picks values like for example 'Choose one' or '_____________'

here's the code i have so far...

thanks

<script language="javascript">

function empty()

{

var errors='';

if (document.code.transfer.options[document.code.transfer.selectedIndex].value == 'Choose code type:') errors+='Please select New or Transfer';
if (document.code.transfer.options[document.code.transfer.selectedIndex].value == '-') errors+='Please select New or Transfer';

if (errors) {
alert('The form is unable to submit due to the following error(s):'+errors+'Please make changes and submit again.');
}

document.MM_returnValue = (errors == '');

}

</script>

<body bgcolor="#EEEEDD" topmargin="0" leftmargin="0" marginheight="0" marginwidth="0">

<form name="code" onsubmit="empty(); return document.MM_returnValue" action="index2.cgi" method="POST"><input type="hidden" name="action" value="step2">

<form><input type="hidden" name="action" value="generate">

Code Type: &nbsp;&nbsp;&nbsp;&nbsp;<select name="transfer" onChange="submit();" size="1" STYLE="width: 142px;"><option value="Choose" SELECTED>Choose code type:</option><option value="-">------------------------</option><option value="New">New</option><option value="Transfer">Transfer</option></select>

</form>

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Asked On
2004-12-14 at 07:18:57ID21241864
Tags

onchange

,

submit

,

javascript

Topic

JavaScript

Participating Experts
3
Points
20
Comments
10

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Answers

 

by: a1programmerPosted on 2004-12-14 at 07:23:57ID: 12820150

Notice changes to the values returned by the function, and onSubmit in the form tag.



<script language="javascript">

function empty(){
      
      var errors='';
      
      if (document.code.transfer.options[document.code.transfer.selectedIndex].value == 'Choose code type:')
                  errors+='Please select New or Transfer';
      
      if (document.code.transfer.options[document.code.transfer.selectedIndex].value == '-')
                  errors+='Please select New or Transfer';
      
      if (errors) {
            alert('The form is unable to submit due to the following error(s):'+errors+'Please make changes and submit again.');
            return false;
      }

      return true;
}

</script>

<body bgcolor="#EEEEDD" topmargin="0" leftmargin="0" marginheight="0" marginwidth="0">

<form name="code" onsubmit="return empty();" action="index2.cgi" method="POST"><input type="hidden" name="action" value="step2">

<form><input type="hidden" name="action" value="generate">

Code Type: &nbsp;&nbsp;&nbsp;&nbsp;<select name="transfer" onChange="submit();" size="1" STYLE="width: 142px;"><option value="Choose" SELECTED>Choose code type:</option><option value="-">------------------------</option><option value="New">New</option><option value="Transfer">Transfer</option></select>

</form>

 

by: BustaroomsPosted on 2004-12-14 at 07:24:16ID: 12820153

onsubmit of the form isn't going to fire b/c you are submitting the form programmatically.  onsubmit will only fire when the submit button or submit image is clicked.  you should do the error checking in the onchange and submit() from the code.

 

by: GwynforWebPosted on 2004-12-14 at 07:24:58ID: 12820162

20pts? Answering this will cause point deflation in this TA.

 

by: jmingoPosted on 2004-12-14 at 07:47:18ID: 12820413

i solved it... i did it in cgi.

thanks for the replies.

 

by: GwynforWebPosted on 2004-12-14 at 07:57:15ID: 12820550

we are experts in JS,  don't bullshit us. You did not solve the stated question with CGI.  a1programmer solved this and should get the points.  (   ... == 'Choose code type:'    though should read  ... == 'Choose'  )

 

by: jmingoPosted on 2004-12-14 at 08:27:20ID: 12820990

i'm sorry, i tried his answer but it didn't work. i copied his code line for line. tried Choose, and Choose code type:

and yes i did solve it in cgi (perl)... here is the code.

if ($action eq "step2") {
        if ($transfer eq "New") {
        step2;
        } elsif ($transfer eq "-") {
        single;
        } elsif ($transfer eq "Check code type:") {
        single;
        } else {
        transfer;
        }
}

and one more thing... you should probably cut out the swearing on a programming board. its not neccesary.

i'll accept his answer anyhow just so you'll settle down.

thanks a1programmer for your time and code.

 

by: GwynforWebPosted on 2004-12-14 at 08:34:33ID: 12821087

.. I do not think you would have responded with the points if I had not made my point, and I will use what ever language I please.

 

by: jmingoPosted on 2004-12-14 at 08:51:47ID: 12821259

think whatever you like.

but the fact is, i got it to do what i wanted within perl and javascript.

 

by: a1programmerPosted on 2004-12-14 at 09:09:12ID: 12821444

Ok, thanks...

Here's the correct code with javascript for future reference...,  since there were errors in my code.  I didn't notice the onchange submit (I should have payed more attention)...  

Bustarooms was right, the onSubmit event doesn't fire if you call submit yourself.   Instead of calling submit, I called empty, and passed the form name as a parameter, and submitted it if no errors were found.  ;)

Gwen was right, should have been "Choose" instead of "Choose code type:"



<script language="javascript">

function empty(formObj){
   
     var errors='';
     
     if (document.code.transfer.options[document.code.transfer.selectedIndex].value == 'Choose')
               errors+='Please select New or Transfer';
     
     if (document.code.transfer.options[document.code.transfer.selectedIndex].value == '-')
               errors+='Please select New or Transfer';
     
     if (errors) {
          alert('The form is unable to submit due to the following error(s):'+errors+'Please make changes and submit again.');
        return;
      }

     formObj.submit();
}

</script>

<body bgcolor="#EEEEDD" topmargin="0" leftmargin="0" marginheight="0" marginwidth="0">

<form name="code" onsubmit="return empty();" action="index2.cgi" method="POST"><input type="hidden" name="action" value="step2">

<form>
     <input type="hidden" name="action" value="generate">

     Code Type: &nbsp;&nbsp;&nbsp;&nbsp;

     <select name="transfer" onChange="empty(document.code);" size="1" STYLE="width: 142px;">
           <option value="Choose" SELECTED>Choose code type:</option>
           <option value="-">------------------------</option>
           <option value="New">New</option>
            <option value="Transfer">Transfer</option>
      </select>

</form>

 

by: jmingoPosted on 2004-12-14 at 09:36:51ID: 12821780

thank you very much a1programmer... i appreciate it.

see Gwyn it wasn't working. thanks for the tip anyway on the Choose thing.



20120131-EE-VQP-002

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