function alertSize() {
		  var myWidth = 0, myHeight = 0;
		  if( typeof( window.innerWidth ) == 'number' ) {
			//Non-IE
			myWidth = window.innerWidth;
			myHeight = window.innerHeight;
		  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
			//IE 6+ in 'standards compliant mode'
			myWidth = document.documentElement.clientWidth;
			myHeight = document.documentElement.clientHeight;
		  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
			//IE 4 compatible
			myWidth = document.body.clientWidth;
			myHeight = document.body.clientHeight;
		  }
		 //window.alert( 'Width = ' + myWidth );
		  //window.alert( 'Height = ' + myHeight );
		//}
		if(myHeight >= 610){
			document.write("<style type=\"text/css\">#FrameDiv{width:996px; height:772px;margin:auto;position:absolute;left: 50%; /*top: 50%; margin-top: -330px; */margin-top:20px;/* moitié de la hauteur */ margin-left: -498px; /* moitié de la largeur */}</style>");
		}else{
			document.write("<style type=\"text/css\">#FrameDiv{width:996px; height:610px;margin:auto;position:absolute;left: 50%;margin-top:10px;  margin-left: -498px; /* moitié de la largeur */ }</style>");
		}
	}	
	alertSize();