/* FADE-IN SLIDESHOW ------------------------------------------------------------  */
/*                                                                                 */
/* Script for displaying a series of images, gradually fading from one to the next */
/*                                                                                 */
/* This is based on a script by these Most Excellent Geeks:                        */

/**********************************************************************************
* Ultimate Fade-In Slideshow (v1.51): © Dynamic Drive (http://www.dynamicdrive.com)
* This notice MUST stay intact for legal use
* Visit http://www.dynamicdrive.com/ for this script and 100s more.
**********************************************************************************/

/* Modified by Bruce Sharp (cambodia@aol.com), so don't blame DynDrive for bugs. */
/* PicFader Build 6                                                              */
/* ------------------------------------------------------------------------------*/



/* This version of the script is intended for use in situations where several    */
/* different pages will have slideshows, and each page will use a unique set of  */
/* images. Customization is done mainly within the script, and each page will    */
/* pass in the ID of the image set.                                              */


// First we set a few necessary variables. No need to mess with these:

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




function fadeshow(setID){

	// Define an array that will hold our images
	var theimages=new Array()


	// Define a few variables and configure as desired:

	var fadebgcolor="white"
	var delay=6       // delay between image change, in seconds
	var pause=1       // this is a boolean - 1 means pause the slideshow
	                  // on mouseover, and  0 means no
	var useRandom=1   // another boolean - 1 means order the pics randomly, 
	                  // 0 means use the predefined order

	// You can also choose some text for the image "alt" tags.
	// Which text is used will be determined by whether or not
	// you've chosen to pause on mouseover

	var pauseText="Move your mouse off the image to resume"
	var noPauseText="Photo: Bruce Sharp"


	// Set some parameters for each unique group of images
	// We could also make the pauseText and noPauseText values
	// unique for each set, but I'm not doing that here

	if (setID=="index"){
		theimages[0]=["imageset/index0.jpg"]
		theimages[1]=["imageset/index1.jpg"]
		theimages[2]=["imageset/index2.jpg"]
		theimages[3]=["imageset/index3.jpg"]
		theimages[4]=["imageset/index4.jpg"]
 		fadewidth=185
		fadeheight=240
	}

	else {
		theimages[0]=["imageset/generic0.jpg"]
		theimages[1]=["imageset/generic1.jpg"]
		theimages[2]=["imageset/generic2.jpg"]
		fadewidth=185
		fadeheight=240
	}



	this.pausecheck=pause
	this.mouseovercheck=0
	this.delay=(delay * 1000)
	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 (useRandom == 1) {
		theimages.sort(function() {return 0.5 - Math.random();}) //thanks to Mike (aka Mwinter) :)
	}

	if (pause == 1) {
		altText=pauseText
	}

	else {
		altText=noPauseText
	}

	this.theimages=theimages
	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 (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=""
	slideHTML='<img src="'+this.postimages[picindex].src+'" alt="'+altText+'">'
	picobj.innerHTML=slideHTML
}
 
 
fadeshow.prototype.rotateimage=function(){
	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
}
 
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){
		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()
}