function validateForm(form) {
	if (form.firstname.value == "") {
	   alert("Please enter your first name."); 
	   form.firstname.focus( ); 
	   return false; 
	}
	if (form.surname.value == "") {
	   alert("Please enter your surname."); 
	   form.surname.focus( ); 
	   return false; 
	}
	if (form.position.value == "") {
	   alert("Please enter your position."); 
	   form.position.focus( ); 
	   return false; 
	}
	if (form.company.value == "") {
	   alert("Please enter your company name."); 
	   form.company.focus( ); 
	   return false; 
	}
	if (form.telephonenumber.value == "") {
	   alert("Please enter your telephone number."); 
	   form.telephonenumber.focus( ); 
	   return false; 
	}
	if (form.emailaddress.value == "") {
	   alert("Please enter your email address."); 
	   form.emailaddress.focus( ); 
	   return false; 
	}
	if (form.enquiry.value == "") {
	   alert("Please enter your enquiry."); 
	   form.enquiry.focus( ); 
	   return false; 
	}
}