function ttSlideShow (name,imagedisplay,textdisplay,imageset){
    this.name=name;
    this.imagedisplay=imagedisplay;
    this.textdisplay=textdisplay;
    this.imageset=imageset;
    this.interval=10000;
    this.fadelength=500;
	this.startFadeIn=true;
}

ttSlideShow.prototype.init = function(){
    this.imagedisplay=document.getElementById(this.imagedisplay);
    this.textdisplay=document.getElementById(this.textdisplay);
    this.preloadImages();
    var doc='<div style="'+(this.startFadeIn ? '' : 'background-image: url('+this.imageset[0].src+'); ')+'background-repeat: no-repeat;" id="'+this.name+'_blenddiv">';
    doc+='<img src="'+this.imageset[0].src+'" style="filter: alpha(opacity=0); -moz-opacity: 0; opacity: 0;" id="'+this.name+'_blendimage" alt="" />';
    doc+='</div>';
    this.imagedisplay.innerHTML=doc;
    this.currentimage=0;
    this.textdisplay.innerHTML=this.imageset[this.currentimage].description;
    this.imagedisplay.slideshow=this;
	if (this.startFadeIn){
		opacity(this.name+'_blendimage',0,100,this.fadelength);
	}
    this.thread=setInterval("document.getElementById('"+this.imagedisplay.id+"').slideshow.nextImage();",this.interval);
}

ttSlideShow.prototype.preloadImages = function(){
    for (i=0; i<this.imageset.length; i++){
        image=new Image();
        image.src=this.imageset[i].src;
    }
}

ttSlideShow.prototype.nextImage = function(){
    this.gotoImage((this.currentimage+1) % this.imageset.length);
}

ttSlideShow.prototype.gotoImage = function(index){
    this.currentimage=index % this.imageset.length;
    this.textdisplay.innerHTML=this.imageset[this.currentimage].description;
    blendimage(this.name+'_blenddiv',this.name+'_blendimage', this.imageset[this.currentimage].src,this.fadelength);
}