/* Only used on equity release currently - can add sitewide if we get many more misc js functions */
function ValidateOver55(sender, args)
{
    var ctrlPrefix = 'ctl00_ContentPlaceHolder1_ucEquityReleaseEnquiryForm_'
    var dateToCheck = new Date(parseInt(document.getElementById(ctrlPrefix + 'ddlDOBYear').value),parseInt(document.getElementById(ctrlPrefix + 'ddlDOBMonth').value)-1,parseInt(document.getElementById(ctrlPrefix + 'ddlDOBDay').value));
    var fiftyfiveYearsAgo = new Date();
   
    fiftyfiveYearsAgo.setYear(fiftyfiveYearsAgo.getFullYear() - 55);
    fiftyfiveYearsAgo.setHours(0);
    fiftyfiveYearsAgo.setMinutes(0);
    fiftyfiveYearsAgo.setSeconds(1);
   
    if (dateToCheck.getTime() <= fiftyfiveYearsAgo.getTime())
    {  
    
        args.IsValid = true;
        return;
    }
    
    args.IsValid = false;
}

function GetAgeInYearsFromDOB(year,month,day)
{
    var now = new Date()
    var dob = new Date(parseInt(year),parseInt(month)-1,parseInt(day));
   
    var ms = now.getTime()-dob.getTime();
    var minutes = ms / 1000 / 60;
    var hours =  minutes / 60;
    var days =  hours / 24;
    var years = days / 365.25;

    return Math.floor(years);
}

String.prototype.trim = function() {
	return this.replace(/^\s+|\s+$/g,"");
}

String.prototype.isValidPostcode = function() {

    toCheck=this;
  // 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 true;
	}
	else 
    {
		return false;
	}
}

/*
Get value of selected radio button group
http://johndyer.name/post/2006/08/Get-the-value-of-a-radio-button-in-JavaScript.aspx
*/
function getRadioValue(idOrName) {
        var value = null;
        var element = document.getElementById(idOrName);
        var radioGroupName = null;  
        
        // if null, then the id must be the radio group name
        if (element == null) {
                radioGroupName = idOrName;
        } else {
                radioGroupName = element.name;     
        }
        if (radioGroupName == null) {
                return null;
        }
        var radios = document.getElementsByTagName('input');
        for (var i=0; i<radios.length; i++) {
                var input = radios[ i ];    
                if (input.type == 'radio' && input.name == radioGroupName && input.checked) {                          
                        value = input.value;
                        break;
                }
        }
        return value;
}

/*Open a new popup window and center on screen*/
function PopupCenter(pageURL, title,w,h) 
{
    var left = (screen.width/2)-(w/2);
    var top = (screen.height/2)-(h/2);
    var targetWin = window.open (pageURL, title, 'toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=no, resizable=no, copyhistory=no, width='+w+', height='+h+', top='+top+', left='+left);
}