var posX = 0;
var timer = null;
var stepBase = 2;
var delay = 10;

function slide(step) {
	var div_slide = window.document.getElementById('slide');
	var div_diaporama = window.document.getElementById('diaporama');
	
	if (step < 0) {
		temp = -(posX + step);
	  if (temp > (div_slide.clientWidth - div_diaporama.clientWidth)) return;
	} else {
		temp = posX + step;
	  if (temp > 0) return;
	}
	
	posX += step;
	div_slide.style.left = posX + 'px';
	timer = setTimeout('slide(' + step + ')', delay);
}

function stopSlide() {
	clearTimeout(timer);
}