/* begin ------------------------------------------------------- */

var		gCurrentThumb;
var		gIsMSIE;
var		gIsMSIEChecked = false;
var		gZeCount = 0;

if(!gIsMSIEChecked)
{
	ua = window.navigator.userAgent.toLowerCase();
	gIsMSIE = (ua.indexOf("msie") != -1);
	gIsMSIEChecked = true;
}
if(document.images)
{
	gCurrentThumb = "";
	screen_clear = new Image;
	screen_clear.src = "../img/pic_big_default.jpg";

}

function DoRedrawScreen()
{
	gZeCount++;
	if(gIsMSIE)
	{
		if(document["screen"])
		{
			if(document["screen"].src != "")
			{
				saveSrc = document["screen"].src;
				document["screen"].src = "";
				document["screen"].src = saveSrc;
			}
		}
	}
	/*
	var ua = window.navigator.userAgent.toLowerCase();
	if(ua.indexOf("msie") == -1)
			return;
			
	if(document["screen"])
	{
		if(document["screen"].src != "")
		{
			saveSrc = document["screen"].src;
			document["screen"].src = "";
			document["screen"].src = saveSrc;
		}
	}
	*/
}

//-----------------------------------------------------------------------------
function img_act(imgName)
{
	if(imgName != "")
	{
		if(document.images[imgName])
		{
			bigPictSrce = document.images[imgName].src;
			if(bigPictSrce != "")	// Affecte la "premi�re" grande image
				document["screen"].src = bigPictSrce.replace("_0.jpg", "_1.jpg");
			else	// Probl�me => vide le nom
				imgName = ""	
		}
		else	// Probl�me => vide le nom
			imgName = ""
	} // if(imgName != "")
	
// Fixe le nom du produit dans la variable cach�e
	gCurrentThumb = imgName;
// Si un probl�me est survenu, on affiche l'image "vide"
	if(imgName == "")
		document["screen"].src = "../img/pic_big_default.jpg";
	
	window.setTimeout("DoRedrawScreen()", 500);
	
/*
  if(document.images)
  {
    descrimgOn = eval(imgName + ".src");
    document["screen"].src = descrimgOn;
  }
  */
}
//-----------------------------------------------------------------------------
function img_inact(imgName)
{
  if(document.images)
  {
    descrimgOff = eval(imgName.src);
    document["screen"].src = "../img/pic_big_default.jpg";
  } 
}
//-----------------------------------------------------------------------------

//-----------------------------------------------------------------------------
function BigPictNext()
{
	if(document.images["screen"])
	{
		bigPictSrce = document["screen"].src;
		if(bigPictSrce.indexOf("_1.jpg") > 0)
			document["screen"].src = bigPictSrce.replace("_1.jpg", "_2.jpg");
		else if(bigPictSrce.indexOf("_2.jpg") > 0)
			document["screen"].src = bigPictSrce.replace("_2.jpg", "_3.jpg");
		else if(bigPictSrce.indexOf("_3.jpg") > 0)
			document["screen"].src = bigPictSrce.replace("_3.jpg", "_1.jpg"); // on revient � la premi�re
	
		window.setTimeout("DoRedrawScreen()", 500);
	}
}

/* end ------------------------------------------------------- */