function PopupCentrer(page,options)
{
  var top=(screen.height-hauteur)/2;
  var left=(screen.width-largeur)/2;
  window.open(page,"","top="+top+",left="+left+",width="+350+",height="+200+","+options);
}

function audio(page) 
{
	var largeur=450;
	var hauteur=250;
	var options="menubar=no,scrollbars=no,statusbar=no,resizable=no"
	var top=(screen.height-hauteur)/2;
	var left=(screen.width-largeur)/2;
	window.open(page,"audio","top="+top+",left="+left+",width="+largeur+",height="+hauteur+","+options);
}

/**
 * Change la visibilitée d'un noeud dont l'ID est passé en paramètre
 */
function SwitchVisibility(p_id)
{
	var element = $(p_id);
	if (element != null)
	{
		if (element.style.visibility=='hidden')
		{
			element.style.visibility='visible';
			element.style.display='block';
		}
		else
		{
			element.style.visibility='hidden';
			element.style.display='none';
		}
	}
}

function Show(p_id)
{
	var element = document.getElementById(p_id);
	if (element != null)
	{
		element.style.display='block';
		element.style.visibility='visible';
	}
}

function Hide(p_id)
{
	var element = document.getElementById(p_id);
	if (element != null)
	{
		element.style.visibility='hidden';
		element.style.display='none';
	}
}