function validateForm(form) { 
	if (form.sender_name.value == "") { 
	   alert("The \"name\" field is empty."); 
	   form.sender_name.focus( ); 
	   return false; 
	   }
		
	if (form.message.value == "") { 
	   alert("The \"message\" field is empty."); 
	   form.message.focus( ); 
	   return false; 
	   }
}