/**
 *  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 = 1;
        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 = 500;
        if (!this.oP.offsety)                                                                   this.oP.offsety = -5;
        if (!this.oP.shownoresults)                                                             this.oP.shownoresults = true;
        if (!this.oP.noresults)                                                                 this.oP.noresults = "Nessuna parola trovata";
        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:
                        if(this.iHighlighted>0){
                                this.setHighlightedValue();
                                this.iHighlighted=0;

                        }else{
                                this.submit();
                        }
                        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+this.oP.varname+"="+escape(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 = [];
//alert(req.responseText);
        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 = replaceUnicode(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);
        // 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();
                }
        }
}


_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) );
}

function replaceUnicode(str)
{
        str = str_replace("&#xC0;","A",str);
        str = str_replace("&#xE0;","a",str);
        str = str_replace("&#xC1;","A",str);
        str = str_replace("&#xE1;","a",str);
        str = str_replace("&#xC8;","E",str);
        str = str_replace("&#xE8;","e",str);
        str = str_replace("&#xC9;","E",str);
        str = str_replace("&#xE9;","e",str);
        str = str_replace("&#xCC;","I",str);
        str = str_replace("&#xEC;","i",str);
        str = str_replace("&#xCD;","I",str);
        str = str_replace("&#xED;","i",str);
        str = str_replace("&#xD2;","O",str);
        str = str_replace("&#xF2;","o",str);
        str = str_replace("&#xD3;","O",str);
        str = str_replace("&#xF3;","o",str);
        str = str_replace("&#xD9;","U",str);
        str = str_replace("&#xF9;","u",str);
        str = str_replace("&#xDA;","U",str);
        str = str_replace("&#xFA;","u",str);

        return str;
}

function str_replace(busca, repla, orig)
{
        str     = new String(orig);

        rExp    = "/"+busca+"/g";
        rExp    = eval(rExp);
        newS    = String(repla);

        str = new String(str.replace(rExp, newS));

        return str;
}