!__some changes on Kirupa´s PHP FORM

[FONT=Arial]I need someone to help me out with some changes on Kirupas PHP FORM :

1- Instead of echo “Data has been submitted to $to!”; I wish the redirection to a Thank You Page URL ;

2- If the the input types below are left in blank
<input type=“checkbox” name=“check[]” value=“blue_color”> Blue<br>
<input type=“checkbox” name=“check[]” value=“green_color”> Green<br>
<input type=“checkbox” name=“check[]” value=“orange_color”> Orange<br>
then the message below comes up :

Warning: Invalid argument supplied for foreach() in /home/sites/www.vazzolaconsultoria.eti.br/web/mailer.php on line 12
Data has been submitted to anything@anywhere.net !

is there a way to fix this problem without validating the form
( I find it a bit complicated to validate the form , I am just getting started with PHP , I´ve seen some PHP codes to submit and validate forms and what a headache !)
Cheers[/FONT][SIZE=3][COLOR=Indigo]