conditional validation of form elements 1

[crusader]

Hi
Can anyone tell me how to validate a form where there are several different form elements of which I want to have a "cannot be empty" validation on groups of form fields.
e.g.
f a user enters information into one field (say name in a text field) I want to make sure they fill in certain other related fields for example age and address but dont want to enforce the validation on all of my fields in the rest of the form.

<form method=&quot;post&quot; action=&quot;nextpage.htm&quot;>
<input type=&quot;text&quot; name=&quot;username&quot;>
<input type=&quot;text&quot; name=&quot;useradd&quot;>
<input type=&quot;text&quot; name=&quot;useradd&quot;>
<!-- the 3 above to be related in validation if one is filled in then all 3 must but not 2 below-->

<input type=&quot;text&quot; name=&quot;driver&quot;>
<input type=&quot;text&quot; name=&quot;carmake&quot;>
<!-- the 2 above to be related in validation if one is filled in then other must but not first 3-->

</form>

Any ideas?
Thanks,
Crusader...

 

[quebasic2]

You woud have to use document.formname.whatever to do it.

 

[mwolf00]

This should give you a start... there are easier options if you standardize the field names...

<script>
function checkForm(){
for (x=0; x<document.myForm.elements.length; x++){
thisName = document.myForm.elements[x].name
thisValue = document.myForm.elements[x].value
if (thisName.substr(0,4) == &quot;user&quot; && thisValue != &quot;&quot{
if (document.myForm.username.value == &quot;&quot; || document.myForm.useradd.value == &quot;&quot; || document.myForm.userphone.value == &quot;&quot{
alert(&quot;please complete user info&quot
return false;
}
}
}
}
</script> Get the Best Answers! faq333-2924
Is this an asp FAQ? faq333-3048
Tek-Tips Best Practices: FAQ183-3179

 

[crusader]

Thanks mwolf00!

Thats perfect.

cheers,
Crusader.