var ajaxBox_offsetX = 0;
var ajaxBox_offsetY = 0;
var ajax_list_externalFile = 'dsearch.php';	// 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_list_MSIE = false;
if(navigator.userAgent.indexOf('MSIE')>=0 && navigator.userAgent.indexOf('Opera')<0)ajax_list_MSIE=true;

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;
	if(document.getElementById(ajax_list_activeInput.name + '_hidden'))document.getElementById(ajax_list_activeInput.name + '_hidden').value = inputObj.id; 
	ajax_options_hide();
}

function ajax_options_hide()
{
	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)
{
	
	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='';
	}

	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)
{
	var letters = inputObj.value;
	var content = ajax_list_objects[ajaxIndex].response;
	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_showOptions(inputObj,paramToExternalFile,e)
{
	if(e.keyCode==13 || e.keyCode==9)return;
	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) ;}
		}
			
	}
	
	if(inputObj.value.length<minimumLettersBeforeLookup){
		ajax_options_hide();
		return;
	}
			

	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;			
	}
	
	ajax_list_activeInput = inputObj;
	ajax_optionDiv.onselectstart =  ajax_list_cancelEvent;
	
	if(ajax_list_cachedLists[paramToExternalFile][inputObj.value.toLowerCase()]){
		ajax_option_list_buildList(inputObj.value,paramToExternalFile);			
	}else{
		ajax_optionDiv.innerHTML = '';
		var ajaxIndex = ajax_list_objects.length;
		ajax_list_objects[ajaxIndex] = new sack();
		var 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_option_list_showContent(ajaxIndex,inputObj,paramToExternalFile); };	// Specify function that will be executed after file has been found
		ajax_list_objects[ajaxIndex].runAJAX();		// Execute AJAX function		
	}
	
		
}

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();			
	}
}