var fenetre;
var top=(screen.height-250)/2;
var left=(screen.width-250)/2;

function zoom(page)
{
	if(fenetre){
		fenetre.close();	
	}

	fenetre = window.open(page,"","top="+top+",left="+left+",width=250,height=250,resizable=yes,scrollbars=yes");
	fenetre.focus();
}

function TestFenetre()
{
	if(fenetre){
		fenetre.focus();
	}
}