/**
 *  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 = 5000;
    //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 = false;
    if (!this.oP.noresults)                                    
        this.oP.noresults = "No results!";
    if (!this.oP.maxheight && this.oP.maxheight !== 0)    
        this.oP.maxheight = 250;
    if (!this.oP.cache && this.oP.cache != false)        
        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+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 = [];
    for (var i=0;i<req.results.length;i++)
    {
        this.aSuggestions.push(  { 'id':req.results[i].id, 'value':req.results[i].value, 'info':req.results[i].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);
        eval("var output = val.replace(/("+this.sInput+")/gi,'<em>$1</em>');");
        
        
        var span         = _bsn.DOM.createElement("span", {}, output, true);
        if (arr[i].info != "")
        {
            var strong        = _bsn.DOM.createElement("strong", {}, arr[i].info);
            span.appendChild(strong);
        }
        
        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;
        //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;
    
    url += '&jsoncallback=?';            
    this.req = jQuery.getJSON(url, onComp);    
    return;
    
    // 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) );
}