var fadearray=new Array(); //array to cache fadeshow instances
var fadeclear=new Array(); //array to cache corresponding clearinterval pointers
 
var dom=(document.getElementById); 
var iebrowser=document.all;

function fadeshow(theimages, fadewidth, fadeheight, borderwidth, delay, pause, update_status, start_position )
{
	this.pausecheck=pause;
	this.paused = false;
	this.picId = '!pidId!';
	this.updateCallbackFunction = update_status;	
	this.mouseovercheck=0;
	this.delay=delay;
	this.degree=10; //initial opacity degree (10%)
	if( start_position < theimages.length ) {
		this.curimageindex = Math.max( 0, start_position );
	}
	else
		this.curimageindex = 0;

	fadearray[fadearray.length]=this;
	this.slideshowid=fadearray.length-1;
	this.canvasbase="canvas"+this.slideshowid;
	this.curcanvas=this.canvasbase+"_0";
	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];
		if (theimages[p][4]) {
			this.postimages[p].alt=theimages[p][4];
			this.postimages[p].title=theimages[p][4];
		}
	}
	this.timeout_id=null;
	this.changing=false;
	
	this.fadewidth=fadewidth+this.imageborder*2;
	this.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:'+this.fadewidth+'px;height:'+this.fadeheight+'px;"><div id="'+this.canvasbase+'_0" style="position:absolute;width:'+this.fadewidth+'px;height:'+this.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:'+this.fadewidth+'px;height:'+this.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+'"></div>');

	if (iebrowser&&dom||dom) //if IE5+ or modern browsers such as Firefox
		this.startit();
	else
	{
		this.curimageindex++;
		this.timeout_id = window.setTimeout("fadearray["+this.slideshowid+"].next()", 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
	{
		window.clearInterval( fadeclear[ obj.slideshowid ] );
		if( oldPic = document.getElementById( 'oldPicture' ) ) {
			oldPic.parentNode.removeChild( oldPic );
		}		
		obj.changing = false;
		if(!obj.paused)
			obj.timeout_id = window.setTimeout("fadearray["+obj.slideshowid+"].next()", obj.delay);
	}
}

fadeshow.prototype.populateslide = function( picobj, picindex ) {
	
	if(document.getElementById && document.createTextNode)
	{
		
		if( oldPic = document.getElementById( this.picId ) ) {
			oldPic.id = 'oldPicture';
		}
		var pic = document.createElement( 'img' );
		
		pic.src = this.postimages[picindex].src;
		pic.alt = this.postimages[picindex].alt;
		pic.title = this.postimages[picindex].title;
		pic.id = this.picId;
		pic.width = this.theimages[picindex][1];
		if( this.fadeheight > 0 ) {
			pic.height = this.theimages[picindex][2];
		}
		
		var url = this.theimages[picindex][3];
		if (url && url != "") {
			picobj.onclick = function() { window.location = url; };
			picobj.style.cursor = "pointer";
		} else {
			picobj.onclick = null;
			picobj.style.cursor = "";
		}
		
		if (pic.width == "") {
			pic.width = this.fadewidth;
		
			if( this.fadeheight > 0 ) {
		  		pic.height = this.fadeheight;
			}
		}
		picobj.appendChild( pic );
	}
};

fadeshow.prototype.next = function() {
	window.clearTimeout( this.timeout_id );	
	this.curimageindex = ( this.curimageindex<this.postimages.length-1 )? this.curimageindex+1 : 0;	
	this.doRotate();
};

fadeshow.prototype.previous = function() {
	window.clearTimeout(this.timeout_id);
	this.curimageindex--;
	if( this.curimageindex < 0 )
		this.curimageindex = this.postimages.length - 1;
	this.doRotate();
};

fadeshow.prototype.jumpTo = function( index ) {
	if( index > -1 && index < this.postimages.length )
	{
		window.clearTimeout(this.timeout_id);
		this.curimageindex = index;
		this.doRotate();
		this.stop();
	}
};

fadeshow.prototype.stop = function() {
	this.paused = true;
	window.clearTimeout(this.timeout_id);
};

fadeshow.prototype.start = function() {
	this.paused = false;
	this.doRotate();
};

fadeshow.prototype.doRotate=function() {

	if( this.changing == true )
	{
		window.clearInterval( fadeclear[ this.slideshowid ] );
		if( oldPic = document.getElementById( 'oldPicture' ) ) {
			oldPic.parentNode.removeChild( oldPic );
		}		
		this.changing = false;
	}
	this.changing = true;

	nextcanvas=( this.curcanvas==this.canvasbase+"_0")? this.canvasbase+"_0" : this.canvasbase+"_1";
	this.tempobj = iebrowser ? iebrowser[ nextcanvas ] : document.getElementById( nextcanvas );
	this.populateslide( this.tempobj, ( (this.curimageindex<this.postimages.length )? this.curimageindex : 0 ) );
	
	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;
	}
	
	if( this.updateCallbackFunction ) 
		this.updateCallbackFunction( ( this.curimageindex + 1 ), this.postimages.length );
};

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;
	}
};
 
fadeshow.prototype.startit=function() {
	var crossobj=iebrowser? iebrowser[this.curcanvas] : document.getElementById(this.curcanvas);
	this.doRotate();	
	return;
	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};
	}

};