function validate() {
   var check;

   check=document.getElementById('sal').value;
   if (check=="") {
      alert('Please choose your title');
      document.form.sal.focus();
      return false;}

   check=document.getElementById('first').value;
   if (check=="") {
      alert('Please tell us your first name');
      document.form.first.focus();
      return false;}

   check=document.getElementById('surname').value;
   if (check=="") {
      alert('Please tell us your surname');
      document.form.surname.focus();
      return false;}


   check=document.getElementById('address').value;
   if (check=="") {
      alert('Please tell us your address');
      document.form.address.focus();
      return false;}

   check=document.getElementById('postcode').value;
   if (check=="") {
      alert('Please tell us your postcode');
      document.form.postcode.focus();
      return false;}

   check=document.getElementById('phone').value;
   if (check=="") {
      alert('Please tell us your phone number');
      document.form.phone.focus();
      return false;}

   check=document.getElementById('calltime').value;
   if (check=="") {
      alert('Please tell us the best time to call you');
      document.form.calltime.focus();
      return false;}


   document.form.submit();

}