var minlength = 6;
var maxlength = 15;

function validator(form) { 

  if (form.email.value == "") {
    alert("Please provide us with your Email Address.");
    form.email.focus();    
    return false;
  }
  if (form.password.value == "") {
    alert("Please provide us with a Password that is 6-15 characters in length.");
    form.password.focus();    
    return false;
  }
  if (form.password.value.length > maxlength){
    alert("Please provide us with a Password that is 6-15 characters in length.");
    form.password.focus();     
    return false
  }
  if (form.password.value.length < minlength){
    alert("Please provide us with a Password that is 6-15 characters in length.");
    form.password.focus();     
    return false
  }  
  if (form.fname.value == "") {
    alert("Please provide us with your First Name.");
    form.fname.focus();
    return false;
  }
  if (form.lname.value == "") {
    alert("Please provide us with your Last Name.");
    form.lname.focus();    
    return false;
  } 
  if (form.agency_name.value == "") {
    alert("Please provide us with your Agency Name.");
    form.agency_name.focus();    
    return false;
  } 
  if (form.iata.value == "") {
    alert("Please provide us with your IATA Number.");
    form.iata.focus();    
    return false;
  } 

  if (form.address1.value == "") {
    alert("Please provide us at least one line of Address.");
    form.address1.focus();
    return false;
  }
  if (form.city.value == "") {
    alert("Please provide us with your City.");
    form.city.focus();    
    return false;
  }
  if (form.state.value == "") {
    alert("Please provide us with your State or Province.");
    form.state.focus();
    return false;
  }  
  if (form.postcode.value == "") {
    alert("Please provide us with your Postcode.");
    form.postcode.focus();
    return false;
  }
  if (form.country.value == 0) {
    alert("Please select your Country.");
    return false;
  }  
  if (form.phone.value == "") {
    alert("Please provide us with your Telephone Number.");
    form.phone.focus();
    return false;
  }

return true; 
}