function check(form){ 
  if (form.title.value == "") {alert("Please enter your Title."); form.title.focus(); return false;} 
  else if (form.firstname.value == "") {alert("Please enter your Firstname."); form.firstname.focus(); return false;}   
  else if (form.surname.value == "") {alert("Please enter your Surname."); form.surname.focus(); return false;}   
  else if (form.address.value == "") {alert("Please enter your Address."); form.address.focus(); return false;}   
  else if (form.tel.value == "" && form.mobile.value == "") {
	  alert("Please enter either a landline or mobile number.");
	  form.tel.focus();
	  return false;
  }
  else if (form.email.value == "") { 
    alert("Please enter your e-mail address."); 
    form.email.focus(); 
    return false; 
  } 	
  else if(!(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(form.email.value))){ 
    alert("Please enter a valid email address."); 
    form.email.focus(); 
    return false; 
  } 	
  else if (form.howheard.value == "Please select") {alert("Please let us know how you found us."); form.howheard.focus(); return false;}   
  else{return true;} 
}