problems imploding variables, please help!

hi all, i'm trying to write a mail application that i will be releasing soon for people to download, but i've hit a slight bug / problem. i have an index file with email addresses listed alongside names. each email address has a checkbox which look something like this: ------------------------------ <td><input type="checkbox" name="emailto[]" value="$email"></td> <td><input type="checkbox" name="emailcc[]" value="$email"></td> <td><input type="checkbox" name="emailbcc[]" value="$email"></td> ------------------------------ all $email are pulled out of mysql by the way. anyway, so since these go into an array, i have this code in the next page : -------------------------------- if ($emailto) { $to_list = implode(" , ",$emailto); } if (isset($emailcc)) { $cc_list = implode(" , ",$emailcc); } if (isset($emailbcc)) { $bcc_list = implode(" , ",$emailbcc); } -------------------------------- but when i have all three checboxes ticked (so i can fill up the To: CC: and BCC: fields) for all my emails, then it gives me this error: -------------------------------- Warning: Bad arguments to implode() in email.php on line 27 -------------------------------- any idea of what mistake i'm making?? the code fills up my CC: and BCC: fields, but not the TO: fields... :( TIA! /sunny