// JScript File

/***********************************************
Link To Script:

* http://www.dynamicdrive.com/dynamicindex14/fadeinslideshow.htm
***********************************************/
/*
Properties Of This FadeShow Script:
* Cross browser fade in slideshow script.
* Ability to display multiple slideshows on the same page.
* Optional linking and link targeting for certain images.
* Ability to randomize the display order of the images.
* Set the slideshow to pause when the mouse moves over it.
* Each instance of a fade in slideshow on the page is completely independent of the other.
*/

/*Basic Function Flow:
fadeshow-->startit-->rotateimage-->resetit.
*/

var fadebgcolor="white"
var fadearray=new Array() //array to cache fadeshow instances
var fadeclear=new Array() //array to cache corresponding clearinterval pointers
var rotateclear=new Array()
 
var dom=(document.getElementById) //modern dom browsers
var iebrowser=document.all
 
 //Setsup the fadeshow with all the required attributes for the fadeshow. Starting with the first
 //image as curimageindex=0 and nextimageindex=1 .
 
function fadeshow(theimages, fadewidth, fadeheight, borderwidth, delay, pause, displayorder){
    this.skip = 0
    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();}) 
    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.postimages[p].alt=theimages[p][3]
    }
    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);-moz-opacity:10;-khtml-opacity:10;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);-moz-opacity:10;background-color:'+fadebgcolor+'"></div></div>')
    else
        document.write('<div><img name="defaultslide' + this.slideshowid + '" src="' + this.postimages[0].src + '" alt="' + this.postimages[0].alt + '"></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{
        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
        rotateclear[obj.slideshowid] = 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]+'" target="'+this.theimages[picindex][2]+'">'
    slideHTML+='<img src="' + this.postimages[picindex].src + '" alt="' + this.postimages[picindex].alt + '" border="' + this.imageborder + 'px">'
    if (this.theimages[picindex][1]!="") //if associated link exists for image
        slideHTML+='</a>'
    picobj.innerHTML=slideHTML
}
 
 //This basically changes the images in the FadeShow.
fadeshow.prototype.rotateimage=function(){
    clearInterval(rotateclear[this.slideshowid]);
    clearInterval(fadeclear[this.slideshowid]);
    if (this.pausecheck==1) //if pause onMouseover enabled, cache object
        var cacheobj=this
    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
  
    var slideIndex;
    if(this.curimageindex==0)
    {
        slideIndex=this.postimages.length
    }
    else
    {
        slideIndex= this.curimageindex
    }      
    
    highlight_index(slideIndex)
    
}

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=obj.degree/100
}

//Fadeshow starts with setting up the canavas depending on the browser.
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()
     
} 

// Restarts the slideshow from the specified slide index
fadeshow.prototype.gotoslide=function(slideIndex){
    this.curimageindex = slideIndex;
    this.nextimageindex=(this.curimageindex+1<this.postimages.length)? this.curimageindex+1 : 0
    f.resetit();
    f.startit();
 //To maintain the rotating cycle.
    if(this.curimageindex==0)
    {
        return (this.postimages.length);
    }
    else
    {
        return (this.curimageindex);
    }      
} 

// Rewinds the slideshow one slide back and returns the index of the new slide.
fadeshow.prototype.gotopreviousslide=function()
    {
        //To go to previous image we need to reduce curimageindex by two because it has already progressed by one.
        this.curimageindex =this.curimageindex-2 ;
        if(this.curimageindex<0)
            {
                this.curimageindex=this.curimageindex+this.postimages.length
            }
        return(this.gotoslide( this.curimageindex));
    } 

// Forwards the slideshow to the next slide and returns that slide's index.
fadeshow.prototype.gotonextslide=function()
    {
        //The curimageindex already becomes the next image so we keep it the same.
         return(this.gotoslide( this.curimageindex));
    }