// -------------------------------------------------------------------

// Drop-in Slideshow Script- By Dynamic Drive, available at: http://www.dynamicdrive.com

// Last updated: March 9th, 2007

// -------------------------------------------------------------------



var _dropinslideshowcount=0



function dropinslideshow(imgarray, w, h, delay){

	this.id="_dropslide"+(++_dropinslideshowcount) //Generate unique ID for this slideshow instance (automated)

	this.createcontainer(parseInt(w), parseInt(h))

	this.delay=delay

	this.imgarray=imgarray

	var preloadimages=[]

	for (var i=0; i<imgarray.length; i++){

		preloadimages[i]=new Image()

		preloadimages[i].src=imgarray[i][0]

	}

	this.animatestartpos=parseInt(h)*(-1) //Starting "top" position of an image before it drops in

	this.slidedegree=8 //Slide degree (> is faster)

	this.slidedelay=40 //Delay between slide animation (< is faster)

	this.activecanvasindex=0 //Current "active" canvas- Two canvas DIVs in total

	this.curimageindex=0

	this.zindex=1

	this.isMouseover=0

	this.init()

}





dropinslideshow.prototype.createcontainer=function(w, h){

 document.write('<div id="'+this.id+'" style="position:relative; width:'+w+'px; height:'+h+'px; overflow:hidden">')

	document.write('<div style="position:absolute; width:'+w+'px; height:'+h+'px; top:0;"></div>')

	document.write('<div style="position:absolute; width:'+w+'px; height:'+h+'px; top:-'+h+'px;"></div>')

	document.write('</div>')

	this.slideshowref=document.getElementById(this.id)

	this.canvases=[]

	this.canvases[0]=this.slideshowref.childNodes[0]

	this.canvases[1]=this.slideshowref.childNodes[1]

}



dropinslideshow.prototype.populatecanvas=function(canvas, imageindex){

	var imageHTML='<img src="'+this.imgarray[imageindex][0]+'" style="border: 0" />'

	if (this.imgarray[imageindex][1]!="")

		imageHTML='<a href="'+this.imgarray[imageindex][1]+'" target="'+this.imgarray[imageindex][2]+'">'+imageHTML+'</a>'

	canvas.innerHTML=imageHTML

}





dropinslideshow.prototype.animateslide=function(){

	if (this.curimagepos<0){ //if image hasn't fully dropped in yet

		this.curimagepos=this.curimagepos+this.slidedegree

		this.activecanvas.style.top=this.curimagepos+"px"

	}

	else{

		clearInterval(this.animatetimer)

		this.activecanvas.style.top=0

		this.setupnextslide()

		var slideshow=this

		setTimeout(function(){slideshow.rotateslide()}, this.delay)

	}

}





dropinslideshow.prototype.setupnextslide=function(){

	this.activecanvasindex=(this.activecanvasindex==0)? 1 : 0

	this.activecanvas=this.canvases[this.activecanvasindex]

	this.activecanvas.style.top=this.animatestartpos+"px"

	this.curimagepos=this.animatestartpos

	this.activecanvas.style.zIndex=this.zindex

	this.curimageindex=(this.curimageindex<this.imgarray.length-1)? this.curimageindex+1 : 0

	this.populatecanvas(this.activecanvas, this.curimageindex)

}



dropinslideshow.prototype.rotateslide=function(){

	var slideshow=this

	if (this.isMouseover)

		setTimeout(function(){slideshow.rotateslide()}, 50)

	else

		this.animatetimer=setInterval(function(){slideshow.animateslide()}, this.slidedelay)

}



dropinslideshow.prototype.init=function(){

	var slideshow=this

	this.populatecanvas(this.canvases[this.activecanvasindex], 0)

	this.setupnextslide()

	this.slideshowref.onmouseover=function(){slideshow.isMouseover=1}

	this.slideshowref.onmouseout=function(){slideshow.isMouseover=0}

	setTimeout(function(){slideshow.rotateslide()}, this.delay)

}