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

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

_b.AutoSuggest = function(id, param) {
    if (!document.getElementById) {
        return 0;
    }
    
    this.fld = _b.DOM.gE(id);

    if (!this.fld) {
        return 0;
    }
    
    this.sInp   = "";
    this.nInpC  = 0;
    this.aSug   = [];
    this.iHigh  = 0;
    
    this.opts = param ? param : {};
    
    var k, def = {minchars:1, meth:"get", varname:"input", className:"autosuggest", timeout:2500, delay:250, offsety:-5, shownoresults: false, noresults: "No results!", maxheight: 250, maxentries: 25};
    for (k in def) {
        if (typeof(this.opts[k]) != typeof(def[k])) {
            this.opts[k] = def[k];
        }
    }
    
    var p = this;
    
    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;
    var bubble = 1;

    switch(key) {
        case 13: // Return
            this.setHighlightedValue();
            bubble = 0;
            break;

        case 27: // Esc
            // clear changed input value
            this.fld.value = this.sInp;
            this.clearSuggestions();
            break;
    }

    return bubble;
}

_b.AutoSuggest.prototype.onKeyUp = function(ev) {
    var key = (window.event) ? window.event.keyCode : ev.keyCode;
    var bubble = 1;

    switch(key) {
        case 38: // Up
            this.changeHighlight(key);
            bubble = 0;
            break;

        case 40: // Down
            this.changeHighlight(key);
            bubble = 0;
            break;
        
        default:
            this.getSuggestions(this.fld.value);
    }

    return bubble;
}

_b.AutoSuggest.prototype.getSuggestions = function(val) {
    if (val == this.sInp) {
        return 0;
    }
    
    _b.DOM.remE(this.idAs);
    
    this.sInp = val;
    
    if (val.length < this.opts.minchars) {
        this.aSug = [];
        this.nInpC = val.length;
        return 0;
    }
    
    var ol = this.nInpC; // old length
    this.nInpC = val.length ? val.length : 0;
    
    var pointer = this;
    var input = this.sInp;
    clearTimeout(this.ajID);
    this.ajID = setTimeout( function() { pointer.doAjaxRequest(input) }, this.opts.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)
        return false;
    
    var pointer = this;
    
    // create ajax request
    var url = this.opts.script+this.opts.varname+"="+encodeURIComponent(this.sInp);
    
    if (!url) {
        return false;
    }
    
    var meth = this.opts.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 = [];
    
	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.idAs = "as_"+this.fld.id;
    
    this.createList(this.aSug);
}

_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.opts.shownoresults) {
        return false;
    }
    
    // create holding div
    var div = _b.DOM.cE("div", {id:this.idAs, className:this.opts.className});    
    
    // 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);
        if (arr[i].info != "")
        {
            output = output + " - ";
        }
        
        
        var span        = _b.DOM.cE("span", {}, output, true);
        if (arr[i].info != "")
        {
            var small       = _b.DOM.cE("small", {}, arr[i].info);
            span.appendChild(small);
        }
        
        var a           = _b.DOM.cE("a", { href:"#" });
        
        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", { rel:val }, a  );
        
        ul.appendChild( li );
    }
    
    
    // no results
    if (arr.length == 0 && this.opts.shownoresults) {
        var li = _b.DOM.cE(  "li", {className:"as_warning"}, this.opts.noresults  );
        ul.appendChild( li );
    }
    
    
    div.appendChild( ul );
    
    
    // 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.opts.offsety) + "px";
    div.style.width     = this.fld.offsetWidth - 2 + "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.iHigh = 0;
    
    
    
    
    
    
    // remove list after an interval
    //
    var pointer = this;
    this.toID = setTimeout(function () { pointer.clearSuggestions() }, this.opts.timeout);
};















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

    if (key == 40) { // Down
        n = this.iHigh + 1;
    } else if (key == 38) { // Up
        n = this.iHigh - 1;
    }
    
    if (n > list.childNodes.length) {
        n = list.childNodes.length;
    }    
    if (n < 1) {
        n = 1;
    }
    
    if (key == 38 || key == 40) {
        this.fld.value = this.aSug[n-1].value;
    }
    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.opts.callback) == "function")
            this.opts.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 + 1;
            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) );
};