slide = { 
	init: function(current, slides) {
		self.slides = slides;
		self.current = --current;
		document.getElementById('slide-'+self.slides[self.current]).style.display='block';	
		slide.timer();
	},
	next: function() {
		document.getElementById('slide-'+self.slides[self.current]).style.display='none';
		if(++self.current >= self.slides.length)
			self.current = 0;
		document.getElementById('slide-'+self.slides[self.current]).style.display='block';
	},
	prev: function() {
		document.getElementById('slide-'+self.slides[self.current]).style.display='none';
		if(--self.current < 0)
			self.current = self.slides.length - 1;
		document.getElementById('slide-'+self.slides[self.current]).style.display='block';
	},
	timer: function() {
		slide.next();
		var t=setTimeout("slide.timer()",20000);
	}
}