/************************************************************************************************************
(C) www.dhtmlgoodies.com, April 2006

************************************************************************************************************/	

var ajaxBox_offsetX = 0;
var ajaxBox_offsetY = 0;
var ajax_list_externalFile = '';	// External file to call (appends to path)
//var ajax_list_url = "http://localhost/cassini/shop/"; // Path to external file
//var ajax_list_url = 'http://www.cassinimaps.co.uk:8090/shop/';	// Path to external file
var ajax_list_url = 'http://www.cassinimaps.co.uk/shop/';	// Path to external file

var minimumLettersBeforeLookup = 3;	// Number of letters entered before a lookup is performed.

var ajax_list_objects = new Array();
var ajax_list_cachedLists = new Array();
var ajax_list_activeInput = false;
var ajax_list_activeItem;
var ajax_list_optionDivFirstItem = false;
var ajax_list_currentLetters = new Array();
var ajax_optionDiv = false;
var ajax_optionDiv_iframe = false;

var ajax_call_type = "";
var ajax_search_type = "";
var ajax_page_action = "";
var ajax_list_MSIE = false;
if(navigator.userAgent.indexOf('MSIE')>=0 && navigator.userAgent.indexOf('Opera')<0)ajax_list_MSIE=true;

var currentListIndex = 0;

function ajax_getTopPos(inputObj)
{

  var returnValue = inputObj.offsetTop;
  while((inputObj = inputObj.offsetParent) != null){
	returnValue += inputObj.offsetTop;
  }
  return returnValue;
}
function ajax_list_cancelEvent()
{
	return false;
}

function ajax_getLeftPos(inputObj)
{
  var returnValue = inputObj.offsetLeft;
  while((inputObj = inputObj.offsetParent) != null)returnValue += inputObj.offsetLeft;
  return returnValue;
}

function ajax_option_setValue(e,inputObj)
{
	if(!inputObj)inputObj=this;
	var tmpValue = inputObj.innerHTML;
	if(ajax_list_MSIE)tmpValue = inputObj.innerText;else tmpValue = inputObj.textContent;
	if(!tmpValue)tmpValue = inputObj.innerHTML;
	ajax_list_activeInput.value = tmpValue;
	var search_details = inputObj.id.split("@");
	if (ajax_search_type == "location") {
		if(document.getElementById(ajax_list_activeInput.name + '_location'))document.getElementById(ajax_list_activeInput.name + '_location').value = search_details[0]; 
		if(document.getElementById(ajax_list_activeInput.name + '_x'))document.getElementById(ajax_list_activeInput.name + '_x').value = search_details[1]; 
		if(document.getElementById(ajax_list_activeInput.name + '_y'))document.getElementById(ajax_list_activeInput.name + '_y').value = search_details[2]; 
		//document.getElementById('result').innerHTML = search_details[0] + " " + search_details[1] + " " + search_details[2];
		
		// Run page action.
		eval(ajax_page_action);
		
	} else {
		sheet_output = "";
		var arLen=search_details.length;
		for ( var i=0, len=arLen; i<len; ++i ) {
			sheet_output += search_details[i] + " ";
		}
		document.getElementById('result').innerHTML = "Landranger sheet(s) required : " + sheet_output;
	}
	ajax_options_hide();
	inputObj.value = "";
	inputObj.innerHTML = "";
}

function ajax_options_hide()
{
	if(ajax_optionDiv)ajax_optionDiv.style.display='none';	
	if(ajax_optionDiv_iframe)ajax_optionDiv_iframe.style.display='none';
}

function ajax_options_rollOverActiveItem(item,fromKeyBoard)
{
	if(ajax_list_activeItem)ajax_list_activeItem.className='optionDiv';
	item.className='optionDivSelected';
	ajax_list_activeItem = item;

	if(fromKeyBoard){
		if(ajax_list_activeItem.offsetTop>ajax_optionDiv.offsetHeight){
			ajax_optionDiv.scrollTop = ajax_list_activeItem.offsetTop - ajax_optionDiv.offsetHeight + ajax_list_activeItem.offsetHeight + 2 ;
		}
		if(ajax_list_activeItem.offsetTop<ajax_optionDiv.scrollTop)
		{
			ajax_optionDiv.scrollTop = 0;	
		}
	}
}

function ajax_option_list_buildList(letters,paramToExternalFile)
{
	//alert('ajax_option_list_buildList ' + paramToExternalFile);
	ajax_optionDiv.innerHTML = '';
	ajax_list_activeItem = false;
	if(ajax_list_cachedLists[paramToExternalFile][letters.toLowerCase()].length<=1){
		ajax_options_hide();
		return;			
	}

	ajax_list_optionDivFirstItem = false;
	var optionsAdded = false;
	for(var no=0;no<ajax_list_cachedLists[paramToExternalFile][letters.toLowerCase()].length;no++){
		if(ajax_list_cachedLists[paramToExternalFile][letters.toLowerCase()][no].length==0)continue;
		optionsAdded = true;
		var div = document.createElement('DIV');
		var items = ajax_list_cachedLists[paramToExternalFile][letters.toLowerCase()][no].split(/###/gi);

		if(ajax_list_cachedLists[paramToExternalFile][letters.toLowerCase()].length==1 && ajax_list_activeInput.value == items[0]){
			ajax_options_hide();
			return;						
		}

		div.innerHTML = items[items.length-1];
		div.id = items[0];
		div.className='optionDiv';
		div.onmouseover = function(){ ajax_options_rollOverActiveItem(this,false) }
		div.onclick = ajax_option_setValue;
		if(!ajax_list_optionDivFirstItem)ajax_list_optionDivFirstItem = div;
		ajax_optionDiv.appendChild(div);
	}	
	if(optionsAdded){
		ajax_optionDiv.style.display='block';
		if(ajax_optionDiv_iframe)ajax_optionDiv_iframe.style.display='';
		ajax_options_rollOverActiveItem(ajax_list_optionDivFirstItem,true);
	}

}

function ajax_option_list_showContent(ajaxIndex,inputObj,paramToExternalFile,whichIndex)
{
	if(whichIndex!=currentListIndex)return;
	var letters = inputObj.value;
	var content = ajax_list_objects[ajaxIndex].response;
	if (content == "nothing found") {
		alert ("No results found for " + inputObj.value + ", please search again.\n\n- Check you clicked the correct option for your search.\n- Try again with alternative spelling or punctuation (including full stops after ‘St.’ and dashes between words where appropriate).");
	} else {
		var elements = content.split('|');
		ajax_list_cachedLists[paramToExternalFile][letters.toLowerCase()] = elements;
		ajax_option_list_buildList(letters,paramToExternalFile);
	}
}

function ajax_option_resize(inputObj)
{
	ajax_optionDiv.style.top = (ajax_getTopPos(inputObj) + inputObj.offsetHeight + ajaxBox_offsetY) + 'px';
	ajax_optionDiv.style.left = (ajax_getLeftPos(inputObj) + ajaxBox_offsetX) + 'px';
	if(ajax_optionDiv_iframe){
		ajax_optionDiv_iframe.style.left = ajax_optionDiv.style.left;
		ajax_optionDiv_iframe.style.top = ajax_optionDiv.style.top;			
	}
}

function ajax_showPlacenames(inputObj,paramToExternalFile,searchType,pageAction)
{
	if(inputObj.value.length<minimumLettersBeforeLookup){
		//document.getElementById(inputObj.name +'_hidden').value = "";
		ajax_options_hide();
		return;
	}
	ajax_search_type = searchType;
	ajax_page_action = pageAction;
	if(ajax_list_currentLetters[inputObj.name]==inputObj.value)return;
	if(!ajax_list_cachedLists[paramToExternalFile])ajax_list_cachedLists[paramToExternalFile] = new Array();
	//ajax_list_currentLetters[inputObj.name] = inputObj.value;
	if(!ajax_optionDiv){
		ajax_optionDiv = document.createElement('DIV');
		ajax_optionDiv.id = 'ajax_listOfOptions';	
		document.body.appendChild(ajax_optionDiv);

		if(ajax_list_MSIE){
			ajax_optionDiv_iframe = document.createElement('IFRAME');
			ajax_optionDiv_iframe.border='0';
			ajax_optionDiv_iframe.style.width = ajax_optionDiv.clientWidth + 'px';
			ajax_optionDiv_iframe.style.height = ajax_optionDiv.clientHeight + 'px';
			ajax_optionDiv_iframe.id = 'ajax_listOfOptions_iframe';

			document.body.appendChild(ajax_optionDiv_iframe);
		}

		var allInputs = document.getElementsByTagName('INPUT');
		for(var no=0;no<allInputs.length;no++){
			if(!allInputs[no].onkeyup)allInputs[no].onfocus = ajax_options_hide;
		}			
		var allSelects = document.getElementsByTagName('SELECT');
		for(var no=0;no<allSelects.length;no++){
			allSelects[no].onfocus = ajax_options_hide;
		}

		var oldonkeydown=document.body.onkeydown;
		if(typeof oldonkeydown!='function'){
			document.body.onkeydown=ajax_option_keyNavigation;
		}else{
			document.body.onkeydown=function(){
				oldonkeydown();
			ajax_option_keyNavigation() ;}
		}
		var oldonresize=document.body.onresize;
		if(typeof oldonresize!='function'){
			document.body.onresize=function() {ajax_option_resize(inputObj); };
		}else{
			document.body.onresize=function(){oldonresize();
			ajax_option_resize(inputObj) ;}
		}

	}

	ajax_optionDiv.style.top = (ajax_getTopPos(inputObj) + inputObj.offsetHeight + ajaxBox_offsetY) + 'px';
	ajax_optionDiv.style.left = (ajax_getLeftPos(inputObj) + ajaxBox_offsetX) + 'px';
	if(ajax_optionDiv_iframe){
		ajax_optionDiv_iframe.style.left = ajax_optionDiv.style.left;
		ajax_optionDiv_iframe.style.top = ajax_optionDiv.style.top;			
	}

	// Set external file to call
	if (ajax_search_type == "location") {
		ajax_list_externalFile = 'locresponse.asp';
	} else {
		var ajax_list_externalFile = 'sheetresponse.asp';
	}

	ajax_list_activeInput = inputObj;
	ajax_optionDiv.onselectstart =  ajax_list_cancelEvent;
	currentListIndex++;
	if(ajax_list_cachedLists[paramToExternalFile][inputObj.value.toLowerCase()]){
		ajax_optionDiv.innerHTML = 'Searching...';
		ajax_option_list_buildList(inputObj.value,paramToExternalFile,currentListIndex);			
	}else{
		var tmpIndex=currentListIndex/1;
		ajax_optionDiv.innerHTML = 'Searching...';
		var ajaxIndex = ajax_list_objects.length;
		ajax_list_objects[ajaxIndex] = new sack();
		var url = ajax_list_url + ajax_list_externalFile + '?s=' + paramToExternalFile + '&l=' + inputObj.value.replace(" ","+");
		//var url = ajax_list_url + ajax_list_externalFile + '?' + paramToExternalFile + '=1&letters=' + inputObj.value.replace(" ","+");
		//var url = ajax_list_externalFile + '?' + paramToExternalFile + '=1&searchby='+searchusing+'&letters=' + inputObj.value.replace(" ","+");

		ajax_list_objects[ajaxIndex].requestFile = url;	// Specifying which file to get
		ajax_list_objects[ajaxIndex].onCompletion = function(){ ajax_option_list_showContent(ajaxIndex,inputObj,paramToExternalFile,tmpIndex); };	// Specify function that will be executed after file has been found
		ajax_list_objects[ajaxIndex].runAJAX();		// Execute AJAX function		
	}

	ajax_call_type = paramToExternalFile;

}

function ajax_findPostcode(inputObj,paramToExternalFile,searchType,pageAction)
{
	if(inputObj.value.length<minimumLettersBeforeLookup){
		return;
	}
	ajax_search_type = searchType;
	ajax_page_action = pageAction;
	// Set external file to call
	if (ajax_search_type == "location") {
		ajax_list_externalFile = 'locresponse.asp';
	} else {
		var ajax_list_externalFile = 'sheetresponse.asp';
	}

	var tmpIndex=currentListIndex/1;
	var ajaxIndex = ajax_list_objects.length;
	ajax_list_objects[ajaxIndex] = new sack();

	var url = ajax_list_url + ajax_list_externalFile + '?s=' + paramToExternalFile + '&l=' + inputObj.value.replace(" ","+");
	//var url = ajax_list_url + ajax_list_externalFile + '?' + paramToExternalFile + '=1&letters=' + inputObj.value.replace(" ","+");
	ajax_list_objects[ajaxIndex].requestFile = url;	// Specifying which file to get
	ajax_list_objects[ajaxIndex].onCompletion = function(){ ajax_showPostcode(ajaxIndex,inputObj); };	// Specify function that will be executed after file has been found
	ajax_list_objects[ajaxIndex].runAJAX();		// Execute AJAX function		
}

function ajax_showPostcode(ajaxIndex,inputObj)
{
	var content = ajax_list_objects[ajaxIndex].response;
	sheet_output = "";
	if (content == "nothing found") {
		alert ("No postcode found for " + inputObj.value + ", please search again.");
	} else if (content == "no coverage") {
		alert ("Sorry, the postcode " + inputObj.value + " is not currently covered by Cassini Maps. Please search again.");
	} else {
		var elements = content.split('###');
		//inputObj.value = elements[1];
		inputObj.value = "";
		var search_details = elements[0].split("@");
		if (ajax_search_type == "location") {
			if(document.getElementById(inputObj.id + '_location'))document.getElementById(inputObj.id + '_location').value = search_details[0]; 
			if(document.getElementById(inputObj.id + '_x'))document.getElementById(inputObj.id + '_x').value = search_details[1]; 
			if(document.getElementById(inputObj.id + '_y'))document.getElementById(inputObj.id + '_y').value = search_details[2];
			//document.getElementById('result').innerHTML = search_details[0] + " " + search_details[1] + " " + search_details[2];
			
			// Run page action.
			eval(ajax_page_action);
			
		} else {
			var arLen=search_details.length;
			for ( var i=0, len=arLen; i<len; ++i ) {
				sheet_output += search_details[i] + " ";
			}
			document.getElementById('result').innerHTML = "Landranger sheet(s) required : " + sheet_output;
		}	
	}
}

function ajax_option_keyNavigation(e)
{
	if(document.all)e = event;

	if(!ajax_optionDiv)return;
	if(ajax_optionDiv.style.display=='none')return;

	if(e.keyCode==38){	// Up arrow
		if(!ajax_list_activeItem)return;
		if(ajax_list_activeItem && !ajax_list_activeItem.previousSibling)return;
		ajax_options_rollOverActiveItem(ajax_list_activeItem.previousSibling,true);
	}

	if(e.keyCode==40){	// Down arrow
		if(!ajax_list_activeItem){
			ajax_options_rollOverActiveItem(ajax_list_optionDivFirstItem,true);
		}else{
			if(!ajax_list_activeItem.nextSibling)return;
			ajax_options_rollOverActiveItem(ajax_list_activeItem.nextSibling,true);
		}
	}

	if(e.keyCode==13 || e.keyCode==9){	// Enter key or tab key
		if(ajax_list_activeItem && ajax_list_activeItem.className=='optionDivSelected')ajax_option_setValue(false,ajax_list_activeItem);
		if(e.keyCode==13)return false; else return true;
	}
	if(e.keyCode==27){	// Escape key
		ajax_options_hide();			
	}
}


document.documentElement.onclick = autoHideList;

function autoHideList(e)
{
	if(document.all)e = event;

	if (e.target) source = e.target;
		else if (e.srcElement) source = e.srcElement;
		if (source.nodeType == 3) // defeat Safari bug
			source = source.parentNode;		
	if(source.tagName.toLowerCase()!='input' && source.tagName.toLowerCase()!='textarea')ajax_options_hide();

}