function changeProjectsImage(current, next) {
	
	$('projects-image-' + current).hide();
	$('projects-image-' + next).show();
	
	return false;
	
	
}



function advancedSlide(mode, selector) {
	
	var arrSlides = $$(selector);
	
	var numSlides = arrSlides.length;
	var i = 0;

	arrSlides.each(function(n){

		i++;

		if(n.visible()) {
			active = n;
			currentNumber = i;
		}
	});

	if(mode == 'next') {

		if(currentNumber == numSlides) {
			nextSlide = arrSlides[0];
		} else {
			nextSlide = arrSlides[currentNumber];
		}

	} else {

		if(currentNumber == 1) {
			nextSlide = arrSlides[numSlides-1];
		} else {
			nextSlide = arrSlides[currentNumber-2];
		}

	}

	do_slide(active, nextSlide);


	return false;

}

function do_slide(active, next) {
	$(active).hide();
	$(active).style.visibility = 'hidden';
	
	$(next).show();
	$(active).style.visibility = 'visible';
	
}