How to determine the parent form

[esac]

I am trying to determine which form in my webpage an object belongs to after passing its full location into the function.

In the following example I pass wc.wcUser to the function and alert if it belongs to wcForm (or at least thats what I want to do)

So if I call wcIsNull(document.wcForm.wcUser,'bleh'); I can tell that the parent form is document.wcForm .. that way I can pass information from other forms into the function and not have that part processed.

If you need any more explanation just ask, I find it hard to explain exactly what I am trying to do here


<SCRIPT LANGUAGE=&quot;Javascript&quot;>
function wcIsNull(itmForm,msgAlert) {
if (itmForm.value == '') {
alert(msgAlert);
alert((itmForm.??????? == document.wcForm) ? 'it is' : 'it is not');
itmForm.focus();
}
}
</SCRIPT>

<form name=&quot;wcForm&quot; onsubmit=&quot;wc = document.wcForm; wcIsNull(wc.wcUser,'Please enter a username.'); return false&quot;>
<input type=&quot;text&quot; name=&quot;wcUser&quot; value=&quot;&quot;>
<input type=&quot;submit&quot;>
</form>

 

[iza]

?? what you want to know is if wcUser is in wcForm ???

return(wcForm.wcUSer) [---> true if it is, false else]

 

[esac]

Yes, but see how I pass it to the function, essentially I pass document.wcForm.wcUser to the function. It doesn't matter what object I pass to it, I want to determine which form it came from.. better example, essentially what I am trying to figure out is the stuff in skeleton code:

<SCRIPT LANGUAGE=&quot;Javascript&quot;>
function fIsNull(itmForm) {
if (itmForm.value == '')
if ('itmForm's parent form' == document.wcForm) {
Update some stuff in document.wcForm
} else {
Update some stuff in document.quForm
}
itmForm.focus();
return true;
}
return false;
}

function SubmitHandler() {
if (fIsNull(document.wcForm.wcUser) ||
fIsNull(document.quForm.quBleh) {
return false;
}
}

</SCRIPT>

<form action=&quot;handleit.asp&quot; method=&quot;POST&quot; onSubmit=&quot;return SubmitHandler();&quot; NAME=&quot;wcForm&quot;>
<input type=text name=wcUser>
<input type=submit>
</form>

<form action=&quot;handlequ.asp&quot; method=&quot;POST&quot; onSubmit=&quot;return SubmitHandler();&quot; NAME=&quot;quForm&quot;>
<input type=text name=quBleh>
<input type=submit>
</form>

 

[iza]

i would have done that the other way : instead of looking for the parent's form (coz i don't know how to do this either !) i would have compared itmform to the CHILDREN of wcform :
function is_the_form_in_wcform(ItmForm) {
for (var m=0; m<document.wcForm.forms.length; m++) {
if (document.wcForm.forms[m]== itmForm)
return true
} // close for
return false;
}

another solution is that it seems you have only 2 possible parents form, so compare one after the other :
if (document.wcform.itmform)
// do whatever you were supposed to do if Itm is a child of wcform
elseif (document.quform.itmform)
// do whatever you were supposed to do if Itm is a child of quform
else
//something went wrong !! it's on none of the parents frames !