function checkit (userEntry)
{
   	document.payform.item_number.value = '0';
	document.payform.hosted_button_id.value = '5X4VMBT4KHN7N';
	if(userEntry.toLowerCase()=="shipfree")
   	{
		document.payform.item_number.value = '1';
   		document.payform.hosted_button_id.value = 'AV6P32KJ4NNWJ';
   	}
}