function ChangePanelVisibility (idPanel)
        {
            var panel = document.getElementById(idPanel)
            var visibility = panel.style.visibility
            var display = null
            
            if(visibility == "hidden")
            {
                visibility = "visible"
                display = ""
            }
            else
            {
                visibility = "hidden"
                display = "none"
            }
                        
            //change la visibilité du panneau et modifie l'image
            panel.style.visibility = visibility
            panel.style.display = display
        }

		function iFrameHeight() 
		{
		if(document.all) 
		{
		h = document.frames('myIframe').document.body.scrollHeight;
		document.all.myIframe.style.height = h;
		}
		else 
		{
		h = document.getElementById('myIframe').contentDocument.body.scrollHeight;
		document.getElementById('myIframe').style.height = h;
		}
		}