function updateOrientation(){
		var Vorientation;
		switch(window.orientation){
			case 0:
			Vorientation= "V";
			break;
			
			case -90:
			Vorientation= "H";
			break;
			
			case 90:
			Vorientation= "H";
			break;
			
			case 180:
			Vorientation= "V";
			break;
		}
		
		if (screen.width==320) //iphone
			{
			if(Vorientation=="V")
				{//document.getElementById("haut_H").style.visibility="hidden";
				//document.getElementById("haut_V").style.visibility="visible";
				document.getElementById("tableau").style.height = 416;
				document.getElementById("tableau").style.width = 320;}
			else
				{//document.getElementById("haut_H").style.visibility="visible";
				//document.getElementById("haut_V").style.visibility="hidden";
				document.getElementById("tableau").style.height = 268;
				document.getElementById("tableau").style.width = 480;}
			}
		else //ipad
			{
			if(Vorientation=="V")
				{document.getElementById("tableau").style.height = 945;
				document.getElementById("tableau").style.width = 768;}
			else
				{document.getElementById("tableau").style.height = 690;
				document.getElementById("tableau").style.width = 1024;}
			}
		window.scrollTo(0, 1);
	}