var SlideshowPaint = new Class({
	initialize: function(containerId, myImages) {
		// global vars
		this.container = $(containerId);
		this.myImages = myImages;
		this.currenBgIndex = 0;
		this.frameDelay = 5000;
		
		// set intial bg		
		this.setBg();
	
		//start slideshow
		this.setBg.periodical(this.frameDelay, this);	
		
	},
	setBg: function(curImage) {
		curImage = this.myImages[this.currenBgIndex]
		this.container.setStyle('backgroundImage', 'url(' + curImage + ')');
		if(this.currenBgIndex == (this.myImages.length-2)){
			this.currenBgIndex = 0;
		} else {
			this.currenBgIndex++;	
		}
	}
});