/**
*  author:  Timothy Groves - http://www.brandspankingnew.net
*  version: 1.2 - 2006-11-17
*           1.3 - 2006-12-04
*           2.0 - 2007-02-07
*/

var useBSNns;

if (useBSNns) {
   if (typeof(bsn) == "undefined")
      bsn = {}
   _bsn = bsn;
} else {
   _bsn = this;
}

if (typeof(_bsn.Autosuggest) == "undefined")
   _bsn.Autosuggest = {}

_bsn.AutoSuggest = function (fldID, param) {
   // no DOM - give up!
   if (!document.getElementById)
      return false;

   // get field via DOM
   this.fld = _bsn.DOM.getElement(fldID);

   if (!this.fld)
      return false;
   
   // init variables

   this.sInput       = "";
   this.nInputChars  = 0;
   this.aSuggestions = [];
   this.iHighlighted = 0;

   // parameters object
   this.oP = (param) ? param : {};

   // defaults
   if(!this.oP.minchars)
      this.oP.minchars = 3;
   if(!this.oP.method)
      this.oP.meth = "get";
   if(!this.oP.varname)
      this.oP.varname = "input";
   if(!this.oP.className)
      this.oP.className = "autosuggest";
   if(!this.oP.timeout)
      this.oP.timeout = 2500;
   if(!this.oP.delay)
      this.oP.delay = 200;
   if(!this.oP.offsety)
      this.oP.offsety = -5;
   if(!this.oP.shownoresults)
      this.oP.shownoresults = true;
   if(!this.oP.noresults)
      this.oP.noresults = "Няма резултат!";
   if(!this.oP.maxheight && this.oP.maxheight !== 0)
      this.oP.maxheight = 250;
   if(!this.oP.cache && this.oP.cache != false)
      this.oP.cache = true;

   // Set keyup handler for field
   // and prevent autocomplete from client

   var pointer = this;

   // NOTE: not using addEventListener because UpArrow fired twice in Safari
   //_bsn.DOM.addEvent( this.fld, 'keyup', function(ev){ return pointer.onKeyPress(ev); } );

   this.fld.onkeypress  = function(ev){ return pointer.onKeyPress(ev); }
   this.fld.onkeyup     = function(ev){ return pointer.onKeyUp(ev); }

   this.fld.setAttribute("autocomplete","off");
}

_bsn.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 = true;

   switch(key) {
      case RETURN:
         this.setHighlightedValue();
         bubble = false;
         break;

      case ESC:
         this.clearSuggestions();
         break;
   }
   return bubble;
}

_bsn.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 = true;

   switch(key) {
      case ARRUP:
         this.changeHighlight(key);
         bubble = false;
         break;

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

   return bubble;
}

_bsn.AutoSuggest.prototype.getSuggestions = function (val) {
   // if input stays the same, do nothing
   if (val == this.sInput)
      return false;

   // Input length is less than the min required to trigger a request
   // reset input string
   // do nothing
   if (val.length < this.oP.minchars) {
      this.sInput = "";
      return false;
   }

   // If caching enabled, and user is typing (ie. length of input is increasing)
   // filter results out of aSuggestions from last request
   if (val.length > this.nInputChars && this.aSuggestions.length && this.oP.cache) {
      var arr = [];
      for (var i = 0; i < this.aSuggestions.length; i++) {
         if (this.aSuggestions[i].value.substr(0,val.length).toLowerCase() == val.toLowerCase())
            arr.push(this.aSuggestions[i]);
      }

      this.sInput       = val;
      this.nInputChars  = val.length;
      this.aSuggestions = arr;

      this.createList(this.aSuggestions);

      return false;
   } else {
      // Do new request
      this.sInput       = val;
      this.nInputChars  = val.length;
      var pointer       = this;

      clearTimeout(this.ajID);
      this.ajID = setTimeout( function() { pointer.doAjaxRequest() }, this.oP.delay );
   }

   return false;
}

_bsn.AutoSuggest.prototype.doAjaxRequest = function () {
   var pointer = this;

   // Create ajax request
   var url  = this.oP.script + encodeURIComponent(this.oP.varname) + "=" + encodeURIComponent(this.fld.value);
   var meth = this.oP.meth;

   var onSuccessFunc = function (req) { pointer.setSuggestions(req) };
   var onErrorFunc = function (status) { alert("AJAX error: "+status); };

   var myAjax = new _bsn.Ajax();
   myAjax.makeRequest( url, meth, onSuccessFunc, onErrorFunc );
}

_bsn.AutoSuggest.prototype.setSuggestions = function (req) {
   this.aSuggestions = [];

   if (this.oP.json) {
      var jsondata = eval('(' + req.responseText + ')');
      for (var i=0; i < jsondata.results.length; i++) {
         this.aSuggestions.push({'id':jsondata.results[i].id, 'value':jsondata.results[i].value, 'info':jsondata.results[i].info });
      }
   } 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.aSuggestions.push({'id':results[i].getAttribute('id'), 'value':results[i].childNodes[0].nodeValue, 'info':results[i].getAttribute('info')});
      }
   }
   this.idAs = "as_"+this.fld.id;

   this.createList(this.aSuggestions);
}

_bsn.AutoSuggest.prototype.createList = function(arr) {
   var pointer = this;
   // Get rid of old list
   // and clear the list removal timeout
   _bsn.DOM.removeElement(this.idAs);
   this.killTimeout();

   // create holding div
   var div     = _bsn.DOM.createElement("div", {id:this.idAs, className:this.oP.className});
   var hcorner = _bsn.DOM.createElement("div", {className:"as_corner"});
   var hbar    = _bsn.DOM.createElement("div", {className:"as_bar"});
   var header  = _bsn.DOM.createElement("div", {className:"as_header"});
   header.appendChild(hcorner);
   header.appendChild(hbar);
   div.appendChild(header);

   // Create and populate ul
   var ul = _bsn.DOM.createElement("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.sInput.toLowerCase());
      var output  = val.substring(0,st) + "<em>" + val.substring(st, st+this.sInput.length) + "</em>" + val.substring(st+this.sInput.length);

      var span    = _bsn.DOM.createElement("span", {}, output, true);
      if (arr[i].info != "") {
         var br = _bsn.DOM.createElement("br", {});
         span.appendChild(br);
         var small = _bsn.DOM.createElement("small", {}, arr[i].info);
         span.appendChild(small);
      }

      var a    = _bsn.DOM.createElement("a", { href:"#" });
      var tl   = _bsn.DOM.createElement("span", {className:"tl"}, " ");
      var tr   = _bsn.DOM.createElement("span", {className:"tr"}, " ");
      a.appendChild(tl);
      a.appendChild(tr);
      a.appendChild(span);

      a.name = i+1;
      a.onclick = function () { pointer.setHighlightedValue(); return false; }
      a.onmouseover = function () { pointer.setHighlight(this.name); }

      var li = _bsn.DOM.createElement(  "li", {}, a  );
      ul.appendChild(li);
   }

   // no results
   if (arr.length == 0) {
      var li = _bsn.DOM.createElement("li", {className:"as_warning"}, this.oP.noresults);
      ul.appendChild(li);
   }

   div.appendChild(ul);

   var fcorner = _bsn.DOM.createElement("div", {className:"as_corner"});
   var fbar    = _bsn.DOM.createElement("div", {className:"as_bar"});
   var footer  = _bsn.DOM.createElement("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 = _bsn.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   = this.fld.offsetWidth + "px";

   // 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.iHighlighted = 0;

   // remove list after an interval
   var pointer = this;
   this.toID = setTimeout(function () { pointer.clearSuggestions() }, this.oP.timeout);
}

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

   var n;

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

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

_bsn.AutoSuggest.prototype.setHighlight = function(n) {
   var list = _bsn.DOM.getElement("as_ul");
   if (!list)
      return false;

   if (this.iHighlighted > 0)
      this.clearHighlight();

   this.iHighlighted = Number(n);

   list.childNodes[this.iHighlighted-1].className = "as_highlight";

   this.killTimeout();
}


_bsn.AutoSuggest.prototype.clearHighlight = function() {
   var list = _bsn.DOM.getElement("as_ul");
   if (!list)
      return false;

   if (this.iHighlighted > 0) {
      list.childNodes[this.iHighlighted-1].className = "";
      this.iHighlighted = 0;
   }
}

_bsn.AutoSuggest.prototype.setHighlightedValue = function () {
   if (this.iHighlighted) {
      this.sInput = this.fld.value = this.aSuggestions[this.iHighlighted-1].value;

      // move cursor to end of input (safari)
      this.fld.focus();
      if (this.fld.selectionStart)
         this.fld.setSelectionRange(this.sInput.length, this.sInput.length);

      this.clearSuggestions();

      // pass selected object to callback function, if exists
      if (typeof(this.oP.callback) == "function")
         this.oP.callback(this.aSuggestions[this.iHighlighted-1]);
   }
}

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

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

_bsn.AutoSuggest.prototype.clearSuggestions = function () {
   this.killTimeout();

   var ele = _bsn.DOM.getElement(this.idAs);
   var pointer = this;
   if(ele) {
      var fade = new _bsn.Fader(ele,1,0,250,function () { _bsn.DOM.removeElement(pointer.idAs) });
   }
}

// AJAX PROTOTYPE
if (typeof(_bsn.Ajax) == "undefined")
   _bsn.Ajax = {}

_bsn.Ajax = function () {
   this.req = {};
   this.isIE = false;
}

_bsn.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);
   } else if (window.ActiveXObject) {
      // branch for IE/Windows ActiveX version
      this.req = new ActiveXObject("Microsoft.XMLHTTP");
      if (this.req) {
         this.req.onreadystatechange = function () { pointer.processReqChange() };
         this.req.open(meth, url, true);
         this.req.send();
      }
   }
}

_bsn.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);
      }
   }
}

// DOM PROTOTYPE
if(typeof(_bsn.DOM) == "undefined")
   _bsn.DOM = {}

_bsn.DOM.createElement = function (type, attr, cont, html) {
   var ne = document.createElement(type);
   if(!ne)
      return false;

   for (var a in attr)
      ne[a] = attr[a];

   if(typeof(cont) == "string" && !html)
      ne.appendChild(document.createTextNode(cont));
   else if(typeof(cont) == "string" && html)
      ne.innerHTML = cont;
   else if(typeof(cont) == "object")
      ne.appendChild(cont);

   return ne;
}

_bsn.DOM.clearElement = function(id) {
   var ele = this.getElement(id);

   if (!ele)
      return false;

   while (ele.childNodes.length)
      ele.removeChild(ele.childNodes[0]);

   return true;
}

_bsn.DOM.removeElement = function(ele) {
   var e = this.getElement(ele);

   if (!e)
      return false;
   else if(e.parentNode.removeChild(e))
      return true;
   else
      return false;
}

_bsn.DOM.replaceContent = function(id, cont, html) {
   var ele = this.getElement(id);

   if(!ele)
      return false;

   this.clearElement(ele);

   if (typeof(cont) == "string" && !html)
      ele.appendChild(document.createTextNode(cont));
   else if(typeof(cont) == "string" && html)
      ele.innerHTML = cont;
   else if(typeof(cont) == "object")
      ele.appendChild(cont);
}

_bsn.DOM.getElement = function(ele) {
   if (typeof(ele) == "undefined") {
      return false;
   } else if(typeof(ele) == "string") {
      var re = document.getElementById(ele);
      if(!re)
         return false;
      else if(typeof(re.appendChild) != "undefined") {
         return re;
      } else {
         return false;
      }
   } else if(typeof(ele.appendChild) != "undefined")
      return ele;
   else
      return false;
}

_bsn.DOM.appendChildren = function(id, arr) {
   var ele = this.getElement(id);

   if (!ele)
      return false;

   if (typeof(arr) != "object")
      return false;

   for(var i = 0; i < arr.length; i++) {
      var cont = arr[i];
      if (typeof(cont) == "string")
         ele.appendChild(document.createTextNode(cont));
      else if(typeof(cont) == "object")
         ele.appendChild(cont);
   }
}

_bsn.DOM.getPos = function(ele) {
   var ele = this.getElement(ele);

   var obj = ele;

   var curleft = 0;

   if (obj.offsetParent) {
      while (obj.offsetParent) {
         curleft += obj.offsetLeft;
         obj = obj.offsetParent;
      }
   } else if(obj.x)
      curleft += obj.x;

   var obj = ele;

   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}
}

// FADER PROTOTYPE
if (typeof(_bsn.Fader) == "undefined")
   _bsn.Fader = {}

_bsn.Fader = function (ele, from, to, fadetime, callback) {
   if(!ele)
      return false;

   this.ele       = ele;
   this.from      = from;
   this.to        = to;
   this.callback  = callback;
   this.nDur      = fadetime;
   this.nInt      = 50;
   this.nTime     = 0;
   var p          = this;
   this.nID       = setInterval(function() { p._fade() }, this.nInt);
}

_bsn.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.ele.filters) { // Internet Explorer
      try {
         this.ele.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.ele.style.filter = 'progid:DXImageTransform.Microsoft.Alpha(opacity='+ieop+')';
      }
   } else { // other browsers
      this.ele.style.opacity = op;
   }

   if (this.nTime == this.nDur) {
      clearInterval(this.nID);
      if (this.callback != undefined)
         this.callback();
   }
}

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