/**
 * Extend the prototype element for cross-browser access to the text content of an element
 */
Object.extend(Element.Methods, {
  getTextContent: function(element) {
     if($(element).descendants().length > 0 || /MSIE/.test(navigator.userAgent) && !window.opera) {
    	var str = $(element).innerHTML;
	 	var regex = /<.*?>/g;
		str = str.replace(regex, ',');
		var parts = str.split(',');
		for (i = 0; i < parts.length; i++) {
			var textContent = parts[i].strip();
			if (textContent.length > 0) return textContent;
		}
     	return '';
    } else {
    	var str = $(element).textContent.strip();
    	return str;
    }
  } 
});
Element.addMethods();

String.prototype.ucFirst = function () {
   return this.substr(0,1).toUpperCase() + this.substr(1,this.length);
}

String.prototype.trim = function () {
  return this.replace(/^\s*(\S*(\s+\S+)*)\s*$/, "$1");
}

Array.prototype.dedup = function () {
  var newArray = new Array ();
  var seen = new Object ();
  for ( var i = 0; i < this.length; i++ ) {
    if ( seen[ this[i] ] ) continue;
    newArray.push( this[i] );
    seen[ this[i] ] = 1;
  }
  return newArray;
}


function toggleRow(e){
	if (Event.element(e).tagName != 'INPUT') {
		row = Event.element(e).parentNode;
		rowInput = row.down('input');
		rowInput.checked = !rowInput.checked;
	}
}

function toggleState(activator){	
	var state = new Array;
		state[0] = 'expanded';
		state[1] = 'minimized';
	var elementClasses = activator.up('div').className;		
	var classArray = elementClasses.split(" ");
	var classesExp = elementClasses.replace(state[1],state[0]);
	var classesMin = elementClasses.replace(state[0],state[1]);
	var contolledBox = activator.up('div').next('form').down('.container')
	if (contolledBox.visible()){
		activator.up('div').className = classesMin;
	}
	else{
		activator.up('div').className = classesExp;	
	}	

}

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;
} 

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 the original invalid 
  // postcode
  if (valid) {return postCode;} else return false;
}