slide = 0;
slides = 	document.getElementById('slides').value;

function startSlides() {
	showSlide();
	setInterval(showSlide,6500);
}

function showSlide() {
	previous_slide = slide - 1;
	if (previous_slide<0) { previous_slide = slides - 1; }
	document.getElementById('slide_'+previous_slide).style.visibility = "hidden";
	document.getElementById('slide_text_'+previous_slide).style.visibility = "hidden";
	document.getElementById('slide_holder_'+previous_slide).style.transform = "scale(1)";
	document.getElementById('slide_'+slide).style.visibility = "visible";
	document.getElementById('slide_text_'+slide).style.visibility = "visible";
	document.getElementById('slide_holder_'+slide).style.transform = "scale(1.2)";
	slide = slide + 1;
	if (slide >= slides) { slide = 0; }
}

window.onload = startSlides;