validating form

hi
i have this order form and i’m validating the required fields by this tags
<input type=’hidden’ name=”required” value=”name,city,pobox,zip,mobile,tele,email”/>
[B]1st Q:[/B] is it possible to use [B]OR[/B] between two inputs i.e if the user enter A or B the form should be valid otherwise it will redirect him to the error page. i.e <input type=’hidden’ name=”required” value=”name,city,pobox,zip,[COLOR=Red]mobile or tele[/COLOR] email”/>

[B]2nd Q,[/B] we are selling CDs on this website and we have two types of CDs, only CD and with giftbox CD (both of them checkboxes)
and under each type quantity from 1-10(dropdown menu)
and more than 10 (textfield)
so total of 4 quantities.
what i want is to check if the user selected either one of the CDs , either of the quantites

i tried this code but it’s not working

<script language=”javascript”>
function verify(){
var msg = ” you are required to complete the following fields: “;

if (document.orders.only_cd.checked==false && document.orders.giftbox.checked==false)
{msg = msg + ” – CD type”;

}

if(document.orders.quantity_only_cd.value==”quantity” && document.orders.quantity_cd_giftbox==”quantity”)
{
msg = msg + ” – CD quantity”;
}

else {
alert(msg);
return false;
}

}
</script>

and i called the function on the <input type=”submit” name=”Submit” value=”Submit” onclick=”verify();”/>

what’s wrong with the code?

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