function validate()
{ if (document.form.name.value == "")
  { alert("Please enter your name.");
    return false; 
  }
  
  if (document.form.email.value != "")
  { if (document.form.email.value.indexOf("@") == -1 || document.form.email.value.indexOf(".") == -1 || document.form.email.value.indexOf(" ") != -1 || document.form.email.value.length < 6)
    { alert("Sorry, the email address does not appear to be valid.");
      return false; 
    }
  }
 
  if (document.form.email.value == "")
  { alert("Please enter your email address.");
    return false; 
  }
  
  if (document.form.subject.value == "")
  { alert("Please enter a subject.");
  	return false;
  }
  
  if (document.form.message.value == "")
  { alert("Message cannot be left blank.");
    return false;
  }
}

function validShip()
{ if (document.form.shipping.value == "")
	{ alert("Please select a valid shipping type."); 
	return false;
	}
}