// JavaScript Document

function checkPostCode (toCheck) {

  // Permitted letters depend upon their position in the postcode.
  var alpha1 = "[abcdefghijklmnoprstuwyz]";                       // Character 1
  var alpha2 = "[abcdefghklmnopqrstuvwxy]";                       // Character 2
  var alpha3 = "[abcdefghjkstuw]";                                // Character 3
  var alpha4 = "[abehmnprvwxy]";                                  // Character 4
  var alpha5 = "[abdefghjlnpqrstuwxyz]";                          // Character 5
  
  // Array holds the regular expressions for the valid postcodes
  var pcexp = new Array ();

  // Expression for postcodes: AN NAA, ANN NAA, AAN NAA, and AANN NAA
  pcexp.push (new RegExp ("^(" + alpha1 + "{1}" + alpha2 + "?[0-9]{1,2})(\\s*)([0-9]{1}" + alpha5 + "{2})$","i"));
  
  // Expression for postcodes: ANA NAA
  pcexp.push (new RegExp ("^(" + alpha1 + "{1}[0-9]{1}" + alpha3 + "{1})(\\s*)([0-9]{1}" + alpha5 + "{2})$","i"));

  // Expression for postcodes: AANA  NAA
  pcexp.push (new RegExp ("^(" + alpha1 + "{1}" + alpha2 + "?[0-9]{1}" + alpha4 +"{1})(\\s*)([0-9]{1}" + alpha5 + "{2})$","i"));
  
  // Exception for the special postcode GIR 0AA
  pcexp.push (/^(GIR)(\s*)(0AA)$/i);
  
  // Standard BFPO numbers
  pcexp.push (/^(bfpo)(\s*)([0-9]{1,4})$/i);
  
  // c/o BFPO numbers
  pcexp.push (/^(bfpo)(\s*)(c\/o\s*[0-9]{1,3})$/i);
  
  // Overseas Territories
  pcexp.push (/^([A-Z]{4})(\s*)(1ZZ)$/i);

  // Load up the string to check
  var postCode = toCheck;

  // Assume we're not going to find a valid postcode
  var valid = false;
  
  // Check the string against the types of post codes
  for ( var i=0; i<pcexp.length; i++) {
    if (pcexp[i].test(postCode)) {
    
      // The post code is valid - split the post code into component parts
      pcexp[i].exec(postCode);
      
      // Copy it back into the original string, converting it to uppercase and
      // inserting a space between the inward and outward codes
      postCode = RegExp.$1.toUpperCase() + " " + RegExp.$3.toUpperCase();
      
      // If it is a BFPO c/o type postcode, tidy up the "c/o" part
      postCode = postCode.replace (/C\/O\s*/,"c/o ");
      
      // Load new postcode back into the form element
      valid = true;
      
      // Remember that we have found that the code is valid and break from loop
      break;
    }
  }
  
  // Return with either the reformatted valid postcode or the original invalid 
  // postcode
  if (valid) {return postCode;} else return false;
}

function Validator(theForm){
	var tempflag=false;
	
	 if (theForm.reginame.value.indexOf("@")<=0){
	 alert("Please enter your email address"); 
	 theForm.reginame.focus(); 
	 return (false); 
	}
	
	if (theForm.regpass1.value== ""){
		alert("Please enter a password.");
		theForm.regpass1.focus();
		return (false);
	}
	
	if (theForm.regpass2.value== ""){
		alert("Please confirm your password.");
		theForm.regpass2.focus();
		return (false);
	}

	if (theForm.title.value== ""){
		alert("Please select your title.");
		theForm.title.focus();
		return (false);
	}
	
	if (theForm.firstname.value== ""){
		alert("Please enter your first name.");
		theForm.firstname.focus();
		return (false);
	}
	
	if (theForm.surname.value== ""){
		alert("Please enter your surname.");
		theForm.surname.focus();
		return (false);
	}
	
	if (theForm.telephone.value== ""){
		alert("Please enter your telephone number.");
		theForm.telephone.focus();
		return (false);
	}
	
	if (theForm.bill_name.value== ""){
		alert("Please enter the contact name at the billing address.");
		theForm.bill_name.focus();
		return (false);
	}
	
	if (theForm.bill_hous.value== ""){
		alert("Please enter the first line of your address.");
		theForm.bill_hous.focus();
		return (false);
	}
	
		
	if (theForm.bill_town.value== ""){
		alert("Please enter your city/town.");
		theForm.bill_town.focus();
		return (false);
	}
	
	
	if (theForm.bill_tele.value== ""){
		alert("Please enter a telephone number for the billing address.");
		theForm.bill_tele.focus();
		return (false);
	}	
	
	var myPostCode = document.getElementById('bill_code').value;
  	if (checkPostCode (myPostCode)) {
    document.getElementById('bill_code').value = checkPostCode (myPostCode);
    
  	} 
 	else {alert ("Postcode has invalid format")
  	theForm.bill_code.focus();
	return (false);
	}
}
// -->