Yeah, I've run into the same problem. My scenario was I had mutiple
checkboxes (so you can select more than one), and the name of the
field was "address[]" (so I had a array of values on the php side).
The only way I could figure around this problem, was to, rather than
use the name of the object directly in Javascript,
(ie- document.formname.address.value), I referenced the object via
the elements array.
eg-
--snip--
var checked = false;
for(i=0; i<document.formname.elements.length; i++) {
if (document.formname.elements[i].type == 'checkbox') {
if (document.formname.elements[i].checked) {
checked = true;
}
}
}
if (!checked) {
alert('You must selected at least one checkbox');
return;
}
--snip--
You can do a similar thing with the select box, by looking for a
different "type".
hope this helps,
Mike
> Hi,
> In a form i have two elements:
>
> I
> <input type="text" name="name" size=25 value="test">
>
> II
> <select name="categories[]" multiple size=10>
> <? option value = ...?>....
> <? option value = ....?>....
>
> Now i want to show an alert message(using javascript) if the text field is
> empty or no option is selected from categories list.
>
> For the text field its working fine as below (the javascript method
called
> when onsubmit method is called):
>
> if(theForm.name.value==""){
> alert("You must enter a Title.");
> theForm.name.focus();
> return(false);
> }
>
> But for the options list(categories) i have tried my best but i couldnt
get
> it work.
> Can anyone please tell me how i can do it.
>
> Thanks
> anil
>
>
>
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