function validateForm(form) {
	if (form.first_name.value == "") {
	   alert("Please enter your first name."); 
	   form.first_name.focus( ); 
	   return false; 
	}
		if (form.last_name.value == "") {
	   alert("Please enter your last name."); 
	   form.last_name.focus( ); 
	   return false; 
	}
	if (form.emailaddress.value == "") {
	   alert("Please enter your email address."); 
	   form.emailaddress.focus( ); 
	   return false; 
	}
	// if (form.contactnumber.value == "") {
	//    alert("Please enter your telephone number."); 
	//    form.contactnumber.focus( ); 
	//    return false; 
	// }
	if (form.enquiry.value == "") {
	   alert("Please enter the nature of your enquiry."); 
	   form.enquiry.focus( ); 
	   return false; 
	}
	
	if (form.brochure.checked == true) {
	
	   	if (form.address1.value == "") {
		   alert("Please enter your address first line."); 
		   form.address1.focus( ); 
		   return false; 
		}
		
	   	if (form.city.value == "") {
		   alert("Please enter your city."); 
		   form.city.focus( ); 
		   return false; 
		}
		
	 	if (form.country.value == "") {
		   alert("Please enter your country."); 
		   form.country.focus( ); 
		   return false; 
		}
		
		if (form.postcode.value == "") {
		   alert("Please enter your postcode."); 
		   form.postcode.focus( ); 
		   return false; 
		}
	
	}
	
}