/******************************************************************************************/
/*************** FICHIER CONTENANT LES PERMETTANT DE DETECTER LA MOUSEWHEEL ***************/
/******************************************************************************************/

function handle(delta)
{
	if(document.getElementById("mask").style.visibility != "visible" && !document.getElementById("TB_window"))
	{
		if (delta < 0)
		{
			try 
			{
				getMovieName("pageflip").flashMouseWheel("OUT");
			}
			catch (erreur)
			{
				//alert(erreur);
			}
		}
		else
		{
			try 
			{
				getMovieName("pageflip").flashMouseWheel("IN");
			}
			catch (erreur)
			{
				//alert(erreur);
			}
		}
	}
}

//Event handler for mouse wheel event.
function wheel(event)
{
	var delta = 0;
	if (!event) /* For IE. */
		event = window.event;
	if (event.wheelDelta) /* IE/Opera. */
	{
		delta = event.wheelDelta/120;
		/** In Opera 9, delta differs in sign as compared to IE.*/
		if (window.opera)
			delta = -delta;
	}
	else if (event.detail) /** Mozilla case. */
	{
		/** In Mozilla, sign of delta is different than in IE.
		 * Also, delta is multiple of 3.*/
		delta = -event.detail/3;
	}
	/** If delta is nonzero, handle it.
	 * Basically, delta is now positive if wheel was scrolled up,
	 * and negative, if wheel was scrolled down.
	 */
	if (delta)
		handle(delta);
	/** Prevent default actions caused by mouse wheel.
	 * That might be ugly, but we handle scrolls somehow
	 * anyway, so don't bother here..*/
	if (event.preventDefault)
		event.preventDefault();
	
	event.returnValue = false;
}

/** Initialization code. 
 * If you use your own event management code, change it as required.*/
if (window.addEventListener)
	/** DOMMouseScroll is for mozilla. */
	window.addEventListener('DOMMouseScroll', wheel, false);

/** IE/Opera. */
window.onmousewheel = document.onmousewheel = wheel;