if(document.images) { 
	currentslide=1; 
	maxslides=22; 
	slide = new Array(maxslides + 1); 
	for(var n=1; n <= maxslides; n++) { 
		slide[n] = new Image(602,454); 
		slide[n].src = n + '.png'; 
	} 
} 

function prevSlide() { 
	if(document.images) { 
		currentslide = currentslide - 1; 
		if(currentslide < 1){ currentslide = maxslides; }
	document.images['slide'].src = slide[currentslide].src; 
	} 
} 

function nextSlide() { 
	if(document.images) { 
		currentslide++; 
		if(currentslide > maxslides){ currentslide = 1; }
		document.images['slide'].src = slide[currentslide].src; 
	}
}