function OuvrirPetiteFenetre()
{
var largeur = screen.width ; 
if (largeur >= 1024)
	{
	window.open('','f2','width=550,height=450,scrollbars=1');
	};
if (largeur < 1024)
    {
	window.open('','f2','width=275,height=225,scrollbars=1');
	};
}