var fadearray=new Array() //array to cache fadeshow instances
var fadeclear=new Array() //array to cache corresponding clearinterval pointers

var fadebgcolor="white"

var dom=(document.getElementById) //modern dom browsers
var iebrowser=document.all

var timeout = null

function fadeshow(theimages, fadewidth, fadeheight, borderwidth, delay, pause, displayorder){
    this.pausecheck=pause
    this.mouseovercheck=0
    this.delay=delay
    this.degree=10 //initial opacity degree (10%)
    this.curimageindex=0
    this.nextimageindex=1
    fadearray[fadearray.length]=this
    this.slideshowid=fadearray.length-1
    this.canvasbase="canvas"+this.slideshowid
    this.curcanvas=this.canvasbase+"_0"
    if (typeof displayorder!="undefined")
        theimages.sort(function() {return 0.5 - Math.random();}) //thanks to Mike (aka Mwinter) :)
    this.theimages=theimages
    this.imageborder=parseInt(borderwidth)
    this.postimages=new Array() //preload images
    for (p=0;p<theimages.length;p++){
        this.postimages[p]=new Image()
        this.postimages[p].src=theimages[p][0]
        this.nexttohighlight = 0;
    }

    var fadewidth=fadewidth+this.imageborder*2
    var fadeheight=fadeheight+this.imageborder*2

    if (iebrowser&&dom||dom) //if IE5+ or modern browsers (ie: Firefox)
        document.write('<div id="master'+this.slideshowid+'" style="position:relative;width:'+fadewidth+'px;height:'+fadeheight+'px;overflow:hidden;">' +
                        '<div id="'+this.canvasbase+'_0" style="position:absolute;width:'+fadewidth+'px;height:'+fadeheight+'px;top:0;left:0;filter:progid:DXImageTransform.Microsoft.alpha(opacity=10);opacity:0.1;-moz-opacity:0.1;-khtml-opacity:0.1;background-color:'+fadebgcolor+';"></div>' +
                        '<div id="'+this.canvasbase+'_1" style="position:absolute;width:'+fadewidth+'px;height:'+fadeheight+'px;top:0;left:0;filter:progid:DXImageTransform.Microsoft.alpha(opacity=10);opacity:0.1;-moz-opacity:0.1;-khtml-opacity:0.1;background-color:'+fadebgcolor+';"></div>' +
                       '</div>');
    else
        document.write('<div><img name="defaultslide'+this.slideshowid+'" src="'+this.postimages[0].src+'"></div>')

    if (iebrowser&&dom||dom){ //if IE5+ or modern browsers such as Firefox
        this.startit();
    }
    else{
        this.curimageindex++
        setInterval("fadearray["+this.slideshowid+"].rotateimage()", this.delay)
    }
}

function fadepic(obj){
    if (obj.degree<100){
        obj.degree+=10
        if (obj.tempobj.filters&&obj.tempobj.filters[0]){
            if (typeof obj.tempobj.filters[0].opacity=="number") //if IE6+
                obj.tempobj.filters[0].opacity=obj.degree
            else //else if IE5.5-
                obj.tempobj.style.filter="alpha(opacity="+obj.degree+")"
        }
        else if (obj.tempobj.style.MozOpacity)
            obj.tempobj.style.MozOpacity=obj.degree/101
        else if (obj.tempobj.style.KhtmlOpacity)
            obj.tempobj.style.KhtmlOpacity=obj.degree/100
        else if (obj.tempobj.style.opacity&&!obj.tempobj.filters)
            obj.tempobj.style.opacity=obj.degree/101
    }
    else{
        clearInterval(fadeclear[obj.slideshowid])
        obj.nextcanvas=(obj.curcanvas==obj.canvasbase+"_0")? obj.canvasbase+"_0" : obj.canvasbase+"_1"
        obj.tempobj=iebrowser? iebrowser[obj.nextcanvas] : document.getElementById(obj.nextcanvas)
        obj.populateslide(obj.tempobj, obj.nextimageindex)
        obj.nextimageindex=(obj.nextimageindex<obj.postimages.length-1)? obj.nextimageindex+1 : 0
        setTimeout("fadearray["+obj.slideshowid+"].rotateimage()", obj.delay)
    }
}

fadeshow.prototype.populateslide=function(picobj, picindex){
    var slideHTML=""
    if (this.theimages[picindex][1]!="") //if associated link exists for image
        slideHTML='<a href="'+this.theimages[picindex][1]+'">'
    slideHTML+='<img src="'+this.postimages[picindex].src+'" alt="'+this.theimages[picindex][2]+'" border="'+this.imageborder+'px">'
    if (this.theimages[picindex][1]!="") //if associated link exists for image
        slideHTML+='</a>'
    picobj.innerHTML=slideHTML
}


fadeshow.prototype.rotateimage=function(){
    //alert("rotate"+this.curimageindex+this.curcanvas);
    if (this.pausecheck==1) //if pause onMouseover enabled, cache object
        var cacheobj=this
    if (this.mouseovercheck==0) {
        this.setmenu(this.nexttohighlight) //highlight the current navigation item
        this.nexttohighlight = this.nexttohighlight+1
        if (this.nexttohighlight>this.theimages.length-1) {
            this.nexttohighlight = 0;
        }
    }
    if (this.mouseovercheck==1)
        setTimeout(function(){cacheobj.rotateimage()}, 100)
    else if (iebrowser&&dom||dom){
        this.resetit()
        var crossobj=this.tempobj=iebrowser? iebrowser[this.curcanvas] : document.getElementById(this.curcanvas)
        crossobj.style.zIndex++
        fadeclear[this.slideshowid]=setInterval("fadepic(fadearray["+this.slideshowid+"])",50)
        this.curcanvas=(this.curcanvas==this.canvasbase+"_0")? this.canvasbase+"_1" : this.canvasbase+"_0"
    }
    else{
        var ns4imgobj=document.images['defaultslide'+this.slideshowid]
        ns4imgobj.src=this.postimages[this.curimageindex].src
    }
    this.curimageindex=(this.curimageindex<this.postimages.length-1)? this.curimageindex+1 : 0;

    // set the z-index properly
    if (this.curimageindex == 1) {
        document.getElementById("canvas0_0").style.zIndex = "1";
        document.getElementById("canvas0_1").style.zIndex = "";
    } else {
        if (this.curcanvas == "canvas0_1") {
            document.getElementById("canvas0_0").style.zIndex = '' + this.curimageindex;
        } else {
            document.getElementById("canvas0_1").style.zIndex = '' + document.getElementById("canvas0_0").style.zIndex;
        }
    }
}

fadeshow.prototype.resetit=function(){
    this.degree=10
    var crossobj=iebrowser? iebrowser[this.curcanvas] : document.getElementById(this.curcanvas)
    if (crossobj.filters&&crossobj.filters[0]){
        if (typeof crossobj.filters[0].opacity=="number") //if IE6+
        crossobj.filters(0).opacity=this.degree
        else //else if IE5.5-
        crossobj.style.filter="alpha(opacity="+this.degree+")"
    }
    else if (crossobj.style.MozOpacity)
        crossobj.style.MozOpacity=this.degree/101
    else if (crossobj.style.KhtmlOpacity)
        crossobj.style.KhtmlOpacity=this.degree/100
    else if (crossobj.style.opacity&&!crossobj.filters)
        crossobj.style.opacity=this.degree/101
}


fadeshow.prototype.startit=function(){
    var crossobj=iebrowser? iebrowser[this.curcanvas] : document.getElementById(this.curcanvas)
    this.populateslide(crossobj, this.curimageindex)
    if (this.pausecheck==1){ //IF SLIDESHOW SHOULD PAUSE ONMOUSEOVER
        var cacheobj=this
        var crossobjcontainer=iebrowser? iebrowser["master"+this.slideshowid] : document.getElementById("master"+this.slideshowid)
    //crossobjcontainer.onmouseover=function(){cacheobj.mouseovercheck=1}
    //crossobjcontainer.onmouseout=function(){cacheobj.mouseovercheck=0}
    }
    this.rotateimage()
}

fadeshow.prototype.pauseit=function(){
    document.getElementById('master'+this.slideshowid).style.display = 'none';
    this.mouseovercheck = 1;
}

fadeshow.prototype.pauseit=function(id) {
    if (timeout != null) {
        clearTimeout(timeout);
        timeout = null;
    }
    document.getElementById('master'+this.slideshowid).style.display = 'none';
    document.getElementById('masterImage').innerHTML = '<img src="'+this.postimages[id].src+'" alt="'+imageSwap.defaultAlt+'"/>';
    this.mouseovercheck = 1;
    this.setmenu(id);
}

fadeshow.prototype.restartitdelayed=function(id){
    var currentImage;
    var nextImage;
    // this is all a bit of hack to work with the mouseover menu
    // means that this script will only work for this one banner
    // which is all we are using
    if (this.curcanvas == "canvas0_0") {
        currentImage = document.getElementById('canvas0_1');
        nextImage = document.getElementById('canvas0_0');
    } else {
        currentImage = document.getElementById('canvas0_0');
        nextImage = document.getElementById('canvas0_1');
    }
    currentImage.innerHTML ='<img src="'+this.postimages[id].src+'" border="'+this.imageborder+'px">'
    if (id == this.postimages.length-1) {
        this.nextimageindex = 1
        nextImage.innerHTML ='<img src="'+this.postimages[0].src+'" border="'+this.imageborder+'px">'
    } else {
        this.nextimageindex = id+2
        if (this.nextimageindex>this.postimages.length-1) {
            this.nextimageindex = 0
        }
        nextImage.innerHTML ='<img src="'+this.postimages[id+1].src+'" border="'+this.imageborder+'px">'
    }

    this.nexttohighlight = id+1
    if (this.nexttohighlight>this.theimages.length-1) {
        this.nexttohighlight = 0;
    }

    
    //currentImage.style.zIndex = this.nexttohighlight;

    this.degree = 10
    timeout = setTimeout("fadearray[\"0\"].restartit("+id+")", 3000)
}

fadeshow.prototype.restartit=function(id){
    document.getElementById('master0').style.display = 'block';
    this.mouseovercheck = 0;
    this.curimageindex = id;
}

fadeshow.prototype.setmenu=function(index) {
    if (document.getElementById('masterImageNav')) {
        for (var y=0; y<this.theimages.length; y++) {
            document.getElementById('image'+y).className = 'normal';
        }
        if (document.getElementById('image'+index)) {
            document.getElementById('image'+index).className = 'over';
        }
    }
}