objects never support my properties

OK...
i feel like a noob asking this but my head hurts too much and i need a quick solution.

i have the following script:

function checkdata(){
<!--
// Check that search field has been filled in
if (document.emailform.Confirmation.value == "") {
alert("Please Fill in the Email Confirmation Field");
document.emailform.Confirmation.focus();
return false;
}
else{
document.emailform.submit();}
return true;
}
//-->
</script>

and i'm getting an error... object doesn't support this property or method... in regards to the submit() line...

what stupid thing have i forgotten???

the script is activations witht he following

<input type="button" name="submit" value="Submit" onclick="checkdata(); document.emailform.FormAction.value = 'submit';" class="buttons">

try this

function checkdata(f){
<!--
// Check that search field has been filled in
if (f.Confirmation.value == "") {
alert("Please Fill in the Email Confirmation Field");
f.Confirmation.focus();
return false;
}
else{
f.submit();}
return true;
}
//-->
</script>

<input type="button" name="submit" value="Submit" onclick="checkdata(this.form); document.emailform.FormAction.value = 'submit';" class="buttons">

hmmmm
no go...

same error

thanks anyway thou

Can you give me a link to the page? It seems like soemthing else is amiss...or at least show me the HTML of the form....

http://www.callabus.co.nz/CustomerLookup.asp?Direction=Auckland&Direction2=Tauranga&#Step2

i'm testing with get on = airport, get off = Greerton, date = 18/01/2003

submit and pick a random time for travel.. it makes no difference
the next page where you enter your details is the page i'm having differculty with.

Hmmmm, it looks like you need fValidate (http://www.peterbailey.net/fValidate/) :D

You know what
go figure...

it works now...

DON'T ask me what i just did...
gotta love the crap involed with IE

Thanks for your help