/**
 *  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
 *
 */





function addArrayAutoSuggest(field_name, submit_on_enter, callback_div, limit_elem_number) {

  if (limit_elem_number) {
    var new_elems = document.getElementsByName(field_name+'[]');
    var elems = new Array(new_elems[limit_elem_number]);
  }
  else
    var elems = document.getElementsByName(field_name+'[]');

  for(var i=0; i<elems.length; i++)
  {
    var options = {
      script: function (input) { return "/autosuggest.php?type="+field_name+"&input="+input+"&limit="+this.maxentries; },
      shownoresults:false,
      maxentries:8,
      bubble:submit_on_enter
    };
    if (callback_div)
      options['callback'] = function (obj) { document.getElementById(callback_div).innerHTML = obj.info; }

    var as = new bsn.AutoSuggest(elems[i], options);
  }

}







function addAutoSuggest(field_name, submit_on_enter, callback_div) {

  var elems = document.getElementsByName(field_name);

  for(var i=0; i<elems.length; i++)
  {
    var options = {
      script: function (input) { return "/autosuggest.php?type="+field_name+"&input="+input+"&limit="+this.maxentries; },
      shownoresults:false,
      maxentries:8,
      bubble:submit_on_enter
    };
    if (callback_div)
      options['callback'] = function (obj) { document.getElementById(callback_div).innerHTML = obj.info; }
    var as = new bsn.AutoSuggest(elems[i], options);
  }

}







if (typeof(bsn) == "undefined")
        _b = bsn = {};


if (typeof(_b.Autosuggest) == "undefined")
        _b.Autosuggest = {};
//else
//        alert("Autosuggest is already set!");












_b.AutoSuggest = function (id, param)
{
        // no DOM - give up!
        //
        if (!document.getElementById)
                return 0;




        // get field via DOM
        //
        this.fld = _b.DOM.gE(id);

        if (!this.fld)
                return 0;




        // init variables
        //
        this.sInp         = "";
        this.nInpC         = 0;
        this.aSug         = [];
        this.iHigh         = 0;




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

        // defaults
        //
        var k, def = {minchars:1, meth:"get", varname:"input", className:"autosuggest", timeout:2500, delay:500, offsety:-5, shownoresults: true, noresults: "No results!", maxheight: 250, cache: true, maxentries: 25, bubble: false};
        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.setAttribute("autocomplete","off");
};
















_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 = true;

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


};








_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.aSug.length;
        if (this.nInpC > ol && l && l<this.oP.maxentries && this.oP.cache)
        {
                var arr = [];
                for (var i=0;i<l;i++)
                {
                        if (this.aSug[i].value.substr(0,val.length).toLowerCase() == val.toLowerCase())
                                arr.push( this.aSug[i] );
                }
                this.aSug = arr;

                this.createList(this.aSug);



                return false;
        }
        else
        // do new request
        //
        {
                var pointer = this;
                var input = this.sInp;
                clearTimeout(this.ajID);
                this.ajID = setTimeout( function() { pointer.doAjaxRequest(input) }, this.oP.delay );
                this.showSearchingMessage();
        }

        return false;
};





_b.AutoSuggest.prototype.doAjaxRequest = function (input)
{
        // check that saved input is still the value of the field
        //
        if (input != this.fld.value)
                return false;


        var pointer = this;


        // create ajax request
        //
        if (typeof(this.oP.script) == "function")
                var url = this.oP.script(encodeURIComponent(this.sInp));
        else
                var url = this.oP.script+this.oP.varname+"="+encodeURIComponent(this.sInp);

        if (!url)
                return false;

        var meth = this.oP.meth;
        var input = this.sInp;

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

};














_b.AutoSuggest.prototype.showSearchingMessage = function()
{
        var pointer = this;



        this.idAs = "as_"+this.fld.id;

        // get rid of old list
        // and clear the list removal timeout
        //
        _b.DOM.remE(this.idAs);
        this.killTimeout();


        // 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"});


        // searching...
        //
        var li = _b.DOM.cE(  "li", {className:"as_warning"}, "Searching <img src='http://dev.ntroduction.com/images/loading.gif' width='16px' height='16px' />", true  );
        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         = this.fld.offsetWidth + "px";



        // add DIV to document
        //
        document.getElementsByTagName("body")[0].appendChild(div);



        // currently no item is highlighted
        //
        this.iHigh = 0;


};













_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(); return false; };
                a.onmouseover = function () { pointer.setHighlight(this.name); };

                var li = _b.DOM.cE(  "li", {}, a  );

                ul.appendChild( li );
        }

        if (arr[0].value.toLowerCase() == this.sInp.toLowerCase()) {
                this.iHigh = 1;
                this.setHighlightedValue();
        }

        // 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         = this.fld.offsetWidth + "px";



        // add DIV to document
        //
        document.getElementsByTagName("body")[0].appendChild(div);


        // 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.parentNode.onmouseover                 = function(e){ e?evt=e:evt=event; target = evt.target?evt.target:evt.srcElement; if (!isChild(target, _b.DOM.gE(pointer.idAs))) pointer.clearSuggestions(); };





        // 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);
};





function isChild(s,d) {
        while(s) {
                if (s==d)
                        return true;
                s=s.parentNode;
        }
        return false;
}









_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 list = _b.DOM.gE("as_ul");
        if (!list)
                return false;

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

        this.iHigh = Number(n);

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


        this.killTimeout();
};


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

        if (this.iHigh > 0)
        {
                list.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) });
        }
};










// AJAX PROTOTYPE _____________________________________________


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 );
                }
        }
};










// DOM PROTOTYPE _____________________________________________


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 )
{
        var 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};
};










// FADER PROTOTYPE _____________________________________________



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) );
};