// locate2.js

function init()
{
  showHidePopup(0);
}

// Check for cookie, if missing or over 2 hours old, display
function showHidePopup(showHide)
{
  if (showHide == 1){
    $('showroom_popup').setStyle({display:'none'});
    $('veil').setStyle({display:'none'});
    createCookie("showroomPopup", "dontshow", .083333); // 2 hours (part of a day)

  }else{
    var expiry = readCookie("showroomPopup");
    if (expiry == null){
      $('veil').setStyle({display:'block'});
      $('showroom_popup').setStyle({display:'block'});

      createCookie("showroomPopup", "dontshow", .083333); // 2 hours (part of a day)
    }
  }
}

// Get matching showrooms
function getMatches()
{
  postcode = document.getElementById('postcode_text').value;


  if (postcode.length < 5){
    postcode+= " 2qa";  // visitor has just put gu34 or g3
  }

  if (!checkPostCode(postcode)){
    alert("Please enter a full and valid postcode ... ");
    return false;
  }

  $('postcode_selection').innerHTML = "<div style=\"text-align:center;margin-top:30px;\"><img src=\"../images/loading.gif\" alt=\"Searching ...\" title=\"Searching ...\" /><br />Searching - please wait ...</div>";
  ajaxCall($F('this_script') +"Ajax.php~_getMatches~~"+ postcode); 

  return true;
}

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);

  // 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 false
  if (valid) {return postCode;} else return false;
}