/**
 *  author:		Timothy Groves - http://www.brandspankingnew.net
 *	version:	1.2 - 2006-11-17
 *              1.3 - 2006-12-04
 *              2.0 - 2007-02-07
 *              2.1.1 - 2007-04-13
 *              2.1.2 - 2007-07-07
 *              2.1.3 - 2007-07-19
 *
 */
var availableChars = "abcdefghijklmnopqrstuvwxyz0123456789";
var bsn;
var searchButton;  // id of searchbutton
try
{
if (typeof(bsn) == "undefined")
var _b = bsn = {}; 			
}
catch (e)
{_b = bsn = {};}

if (typeof(_b.Autosuggest) == "undefined")
	_b.Autosuggest = {};
/*
else
	alert("Autosuggest is already set!");
*/
_b.AutoSuggest = function (searchFieldId, searchButtonId, param)
{
// no DOM - give up!
//
if (!document.getElementById)
return 0;
searchButton = searchButtonId;
// get field via DOM
//
this.fld = _b.DOM.gE( searchFieldId );
if (!this.fld)
return 0;
// init variables
//
this.sInp 	= "";
this.nInpC 	= 0;
this.aSug 	= [];
this.aSugFull 	= [];
this.iHigh 	= 0;
this.firstChar  = "";
// parameters object
//
this.oP = param ? param : {};
// defaults	
//
var k, def = {minchars:1, meth:"get", fieldname:"",  varname:"input", className:"autosuggest", timeout:2500, delay:500, offsety:-5, shownoresults: true, noresults: "No results!", maxheight: 250, cache: false, maxentries: 25};
for (k in def)
 {
 if (typeof(this.oP[k]) != typeof(def[k]))
  this.oP[k] = def[k];
 }
// set keyup handler for field
// and prevent autocomplete from client
//
var p = this;
// NOTE: not using addEventListener because UpArrow fired twice in Safari
//_b.DOM.addEvent( this.fld, 'keyup', function(ev){ return pointer.onKeyPress(ev); } );
this.fld.onkeypress 	= function(ev){ return p.onKeyPress(ev); };
this.fld.onkeyup 		= function(ev){ return p.onKeyUp(ev); };
this.fld.onmouseover = function(ev) { return p.check(); };
this.fld.setAttribute("autocomplete","off");
};

_b.AutoSuggest.prototype.check = function(ev)
{
var x = this.idAs;
if (x)
 {
 val = this.fld.value;
 var l = this.aSugFull.length;
 var arr = [];
 for (var i=0;i<l;i++)
 {
 if (this.aSugFull[i].value.substr(0,val.length).toLowerCase() == val.toLowerCase())
 arr.push( this.aSugFull[i] );
 }
 this.aSug = arr;
 this.createList(this.aSug);

 }
}

_b.AutoSuggest.prototype.onKeyPress = function(ev)
{
var key = (window.event) ? window.event.keyCode : ev.keyCode;
// set responses to keydown events in the field
// this allows the user to use the arrow keys to scroll through the results
// ESCAPE clears the list
// TAB sets the current highlighted value
//
var RETURN = 13;
var TAB = 9;
var ESC = 27;
var bubble = 1;
switch(key)
 {
 case RETURN:
 this.setHighlightedValue();
 bubble = 0;
 break;
 case ESC:
 this.clearSuggestions();
 break;
 }
return bubble;
};

_b.AutoSuggest.prototype.onKeyUp = function(ev)
{
var key = (window.event) ? window.event.keyCode : ev.keyCode;
// set responses to keydown events in the field
// this allows the user to use the arrow keys to scroll through the results
// ESCAPE clears the list
// TAB sets the current highlighted value
//
var ARRUP = 38;
var ARRDN = 40;
var bubble = 1;
switch(key)
 {
 case ARRUP:
 this.changeHighlight(key);
 bubble = 0;
 break;

 case ARRDN:
 this.changeHighlight(key);
 bubble = 0;
 break;
		
 default:
 this.getSuggestions(this.fld.value);
 }
return bubble;
};

_b.AutoSuggest.prototype.getSuggestions = function (val)
{
// if input stays the same, do nothing
//
if (val == this.sInp)
return 0;
// kill list
//
_b.DOM.remE(this.idAs);
this.sInp = val;
// input length is less than the min required to trigger a request
// do nothing
//
if (val.length < this.oP.minchars)
 {
 this.aSug = [];
 this.nInpC = val.length;
 return 0;
 }
var ol = this.nInpC; // old length
this.nInpC = val.length ? val.length : 0;
// if caching enabled, and user is typing (ie. length of input is increasing)
// filter results out of aSuggestions from last request
//
var l = this.aSugFull.length;
if (this.nInpC > ol && l && l<this.oP.maxentries && this.oP.cache)
/*if (val.length>0 && val.substr(0,1).toLowerCase()==this.firstChar && this.oP.cache)*/
 {
 var arr = [];
 for (var i=0;i<l;i++)
 {
 if (this.aSugFull[i].value.substr(0,val.length).toLowerCase() == val.toLowerCase())
 arr.push( this.aSugFull[i] );
 }
 this.aSug = arr;
 this.createList(this.aSug);
 return false;
 }
else
 // do new request
 //
 {
 var pointer = this;
 //var input = this.sInp.substr(0,1).toLowerCase();;
 var input = this.sInp.toLowerCase();
 this.firstChar = val.substr(0,1).toLowerCase();
 clearTimeout(this.ajID);
 this.ajID = setTimeout( function() { pointer.doAjaxRequest(input) }, this.oP.delay );
 }
return false;
};

_b.AutoSuggest.prototype.doAjaxRequest = function (input)
{
// check that saved input is still the value of the field
//
//if (input != this.fld.value.substring(0,1) || availableChars.indexOf( input.substring(0,1).toLowerCase())<0 )
if (input != this.fld.value.toLowerCase() || availableChars.indexOf( input.substring(0,1).toLowerCase())<0 )
 return false;
var pointer = this;
this.aSugFull = [];
// create ajax request
//
//input = this.sInp.substring(0,1);
if (typeof(this.oP.script) == "function")
	var url = this.oP.script(encodeURIComponent(input));
else
	var url = this.oP.script+this.oP.varname+"="+encodeURIComponent(input);
if (!url)
	return false;

if ( this.oP.fieldname.length!=0 )
  {
  // add extra form field value
  var formField = document.getElementById( this.oP.fieldname );
  url = url + "&" + this.oP.fieldname +"=" + formField.selectedIndex; 
  }

var meth = this.oP.meth;
var onSuccessFunc = function (req) { pointer.setSuggestions(req, input) };
var onErrorFunc = function (status) { status; };
var myAjax = new _b.Ajax();
myAjax.makeRequest( url, meth, onSuccessFunc, onErrorFunc );
};

_b.AutoSuggest.prototype.setSuggestions = function (req, input)
{
// if field input no longer matches what was passed to the request
// don't show the suggestions
//
if (input != this.fld.value.toLowerCase())
return false;
this.aSug = [];
if (this.oP.json)
{
var jsondata = eval('(' + req.responseText + ')');
for (var i=0;i<jsondata.results.length;i++)
 {
 //this.aSug.push(  { 'id':jsondata.results[i].id, 'value':jsondata.results[i].value, 'info':jsondata.results[i].info }  );
 this.aSug.push(  { 'id':jsondata.results[i].id, 'value':jsondata.results[i].value }  );
 }
}
else
 {
 var xml = req.responseXML;
 // traverse xml
 //
 var results = xml.getElementsByTagName('results')[0].childNodes;
 for (var i=0;i<results.length;i++)
 {
 if (results[i].hasChildNodes())
  {
  //this.aSugFull.push(  { 'id':results[i].getAttribute('id'), 'value':results[i].childNodes[0].nodeValue, 'info':results[i].getAttribute('info') }  );
  //this.aSug.push(  { 'id':results[i].getAttribute('id'), 'value':results[i].childNodes[0].nodeValue, 'info':results[i].getAttribute('info') }  );
  this.aSugFull.push(  { 'id':results[i].getAttribute('id'), 'value':results[i].childNodes[0].nodeValue }  );
  this.aSug.push(  { 'id':results[i].getAttribute('id'), 'value':results[i].childNodes[0].nodeValue }  );
  }
 }
 }

this.idAs = "as_"+this.fld.id;
this.createList(this.aSugFull);
};

_b.AutoSuggest.prototype.createList = function(arr)
{
var pointer = this;
// get rid of old list
// and clear the list removal timeout
//
_b.DOM.remE(this.idAs);
this.killTimeout();
// if no results, and shownoresults is false, do nothing
//
if (arr.length == 0 && !this.oP.shownoresults)
 return false;
// create holding div
//
var div = _b.DOM.cE("div", {id:this.idAs, className:this.oP.className});	
	
var hcorner = _b.DOM.cE("div", {className:"as_corner"});
var hbar = _b.DOM.cE("div", {className:"as_bar"});
var header = _b.DOM.cE("div", {className:"as_header"});
header.appendChild(hcorner);
header.appendChild(hbar);
div.appendChild(header);
// create and populate ul
//
var ul = _b.DOM.cE("ul", {id:"as_ul"});
// loop throught arr of suggestions
// creating an LI element for each suggestion
//
for (var i=0;i<arr.length;i++)
 {
 // format output with the input enclosed in a EM element
 // (as HTML, not DOM)
 //
 var val = arr[i].value;
 var st = val.toLowerCase().indexOf( this.sInp.toLowerCase() );
 var output = val.substring(0,st) + "<em>" + val.substring(st, st+this.sInp.length) + "</em>" + val.substring(st+this.sInp.length);
 var span 		= _b.DOM.cE("span", {}, output, true);
 if (arr[i].info != "")
  {
  var br			= _b.DOM.cE("br", {});
  span.appendChild(br);
  var small		= _b.DOM.cE("small", {}, arr[i].info);
  span.appendChild(small);
  }
 var a 			= _b.DOM.cE("a", { href:"#" });
		
 var tl 		= _b.DOM.cE("span", {className:"tl"}, " ");
 var tr 		= _b.DOM.cE("span", {className:"tr"}, " ");
 a.appendChild(tl);
 a.appendChild(tr);
 a.appendChild(span);
 a.name = i+1;
 a.onclick = function () 
  { 
  pointer.setHighlightedValue(); 
  document.getElementById( searchButton ).click() ; 
  return false; 
  };
 a.onmouseover = function () { pointer.setHighlight(this.name); };
 var li = _b.DOM.cE(  "li", {}, a  );
 ul.appendChild( li );
 }
// no results
//
if (arr.length == 0 && this.oP.shownoresults)
 {
 var li = _b.DOM.cE(  "li", {className:"as_warning"}, this.oP.noresults  );
 ul.appendChild( li );
 }
div.appendChild( ul );
var fcorner = _b.DOM.cE("div", {className:"as_corner"});
var fbar = _b.DOM.cE("div", {className:"as_bar"});
var footer = _b.DOM.cE("div", {className:"as_footer"});
footer.appendChild(fcorner);
footer.appendChild(fbar);
div.appendChild(footer);

// get position of target textfield
// position holding div below it
// set width of holding div to width of field
//
var pos = _b.DOM.getPos(this.fld);
	
div.style.left 		= pos.x + "px";
div.style.top 		= ( pos.y + this.fld.offsetHeight + this.oP.offsety ) + "px";
div.style.width 	= "200px";
// set mouseover functions for div
// when mouse pointer leaves div, set a timeout to remove the list after an interval
// when mouse enters div, kill the timeout so the list won't be removed
//
div.onmouseover 	= function(){ pointer.killTimeout() };
div.onmouseout 		= function(){ pointer.resetTimeout() };
// add DIV to document
//
document.getElementsByTagName("body")[0].appendChild(div);
// currently no item is highlighted
//
this.iHigh = 0;
// remove list after an interval
//
var pointer = this;
this.toID = setTimeout(function () { pointer.clearSuggestions() }, this.oP.timeout);
};

_b.AutoSuggest.prototype.changeHighlight = function(key)
{	
var list = _b.DOM.gE("as_ul");
if (!list)
return false;
var n;

if (key == 40)
n = this.iHigh + 1;
else if (key == 38)
n = this.iHigh - 1;

if (n > list.childNodes.length)
n = list.childNodes.length;
if (n < 1)
 n = 1;
this.setHighlight(n);
};

_b.AutoSuggest.prototype.setHighlight = function(n)
{
var llist = _b.DOM.gE("as_ul");
if (!llist)
 return false;

if (this.iHigh > 0)
 this.clearHighlight();
	
this.iHigh = Number(n);
llist.childNodes[this.iHigh-1].className = "as_highlight";
this.killTimeout();
};

_b.AutoSuggest.prototype.clearHighlight = function()
{
var llist = _b.DOM.gE("as_ul");
if (!llist)
return false;
if (this.iHigh > 0)
{
llist.childNodes[this.iHigh-1].className = "";
this.iHigh = 0;
}
};

_b.AutoSuggest.prototype.setHighlightedValue = function ()
{
if (this.iHigh)
{
this.sInp = this.fld.value = this.aSug[ this.iHigh-1 ].value;
// move cursor to end of input (safari)
//
this.fld.focus();
if (this.fld.selectionStart)
	this.fld.setSelectionRange(this.sInp.length, this.sInp.length);
this.clearSuggestions();
// pass selected object to callback function, if exists
//
if (typeof(this.oP.callback) == "function")
this.oP.callback( this.aSug[this.iHigh-1] );
}
};

_b.AutoSuggest.prototype.killTimeout = function()
{
clearTimeout(this.toID);
};

_b.AutoSuggest.prototype.resetTimeout = function()
{
clearTimeout(this.toID);
var pointer = this;
this.toID = setTimeout(function () { pointer.clearSuggestions() }, 1000);
};

_b.AutoSuggest.prototype.clearSuggestions = function ()
{
this.killTimeout();
var ele = _b.DOM.gE(this.idAs);
var pointer = this;
if (ele)
{
var fade = new _b.Fader(ele,1,0,250,function () { _b.DOM.remE(pointer.idAs) });
}
};

if (typeof(_b.Ajax) == "undefined")
_b.Ajax = {};
_b.Ajax = function ()
{
this.req = {};
this.isIE = false;
};

_b.Ajax.prototype.makeRequest = function (url, meth, onComp, onErr)
{
if (meth != "POST")
 meth = "GET";
this.onComplete = onComp;
this.onError = onErr;
var pointer = this;
// branch for native XMLHttpRequest object
if (window.XMLHttpRequest)
 {
 this.req = new XMLHttpRequest();
 this.req.onreadystatechange = function () { pointer.processReqChange() };
 this.req.open("GET", url, true); //
 this.req.send(null);
 // branch for IE/Windows ActiveX version
 }
else if (window.ActiveXObject)
 {
 this.req = new ActiveXObject("Microsoft.XMLHTTP");
 if (this.req)
 {
 this.req.onreadystatechange = function () { pointer.processReqChange() };
 this.req.open(meth, url, true);
 this.req.send();
 }
 }
};


_b.Ajax.prototype.processReqChange = function()
{
// only if req shows "loaded"
if (this.req.readyState == 4) {
// only if "OK"
if (this.req.status == 200)
{
this.onComplete( this.req );
} else {
this.onError( this.req.status );
}
}
};

if (typeof(_b.DOM) == "undefined")
	_b.DOM = {};

/* create element */
_b.DOM.cE = function ( type, attr, cont, html )
{
var ne = document.createElement( type );
if (!ne)
	return 0;
for (var a in attr)
	ne[a] = attr[a];
var t = typeof(cont);
	
if (t == "string" && !html)
	ne.appendChild( document.createTextNode(cont) );
else if (t == "string" && html)
	ne.innerHTML = cont;
else if (t == "object")
	ne.appendChild( cont );
return ne;
};



/* get element */
_b.DOM.gE = function ( e )
{
var t=typeof(e);
if (t == "undefined")
	return 0;
else if (t == "string")
{
	var re = document.getElementById( e );
	if (!re)
	return 0;
	else if (typeof(re.appendChild) != "undefined" )
		return re;
	else
		return 0;
}
else if (typeof(e.appendChild) != "undefined")
	return e;
else
	return 0;
};

/* remove element */
_b.DOM.remE = function ( ele )
{
var e = this.gE(ele);
if (!e)
	return 0;
else if (e.parentNode.removeChild(e))
	return true;
else
	return 0;
};


/* get position */
_b.DOM.getPos = function ( e )
{
	e = this.gE(e);

	var obj = e;

	var curleft = 0;
	if (obj.offsetParent)
	{
		while (obj.offsetParent)
		{
			curleft += obj.offsetLeft;
			obj = obj.offsetParent;
		}
	}
	else if (obj.x)
		curleft += obj.x;
	
	var obj = e;
	
	var curtop = 0;
	if (obj.offsetParent)
	{
		while (obj.offsetParent)
		{
			curtop += obj.offsetTop;
			obj = obj.offsetParent;
		}
	}
	else if (obj.y)
		curtop += obj.y;

	return {x:curleft, y:curtop};
};

if (typeof(_b.Fader) == "undefined")
	_b.Fader = {};

_b.Fader = function (ele, from, to, fadetime, callback)
{	
if (!ele)
	return 0;
this.e = ele;
this.from = from;
this.to = to;
this.cb = callback;
this.nDur = fadetime;
this.nInt = 50;
this.nTime = 0;
var p = this;
this.nID = setInterval(function() { p._fade() }, this.nInt);
};

_b.Fader.prototype._fade = function()
{
this.nTime += this.nInt;
var ieop = Math.round( this._tween(this.nTime, this.from, this.to, this.nDur) * 100 );
var op = ieop / 100;
if (this.e.filters) // internet explorer
 {
 try
 {
 this.e.filters.item("DXImageTransform.Microsoft.Alpha").opacity = ieop;
 } catch (e) { 
 // If it is not set initially, the browser will throw an error.  This will set it if it is not set yet.
 this.e.style.filter = 'progid:DXImageTransform.Microsoft.Alpha(opacity='+ieop+')';
 }
 }
else // other browsers
 {
 this.e.style.opacity = op;
 }
	
if (this.nTime == this.nDur)
 {
 clearInterval( this.nID );
 if (this.cb != undefined)
 this.cb();
 }
};


_b.Fader.prototype._tween = function(t,b,c,d)
{
return b + ( (c-b) * (t/d) );
};