function PopupCentrata() {
		   var w = 650;
		   var h = 430;
		   var l = Math.floor((screen.width-w)/2);
		   var t = Math.floor((screen.height-h)/2);
			  window.open("/js/lecci.htm","","width=" + w + ",height=" + h + ",top=" + t + ",left=" + l);
		 }



		function popup(URL, windowname)
		{

		var window_width=800;
        var window_height=400;
        var from_top=80;
        var from_left=100;
        var has_toolbar='no';
        var has_location='no';
        var has_directories='no';
        var has_status='no';
        var has_menubar='no';
        var has_scrollbars='yes';
        var is_resizeable='no';

        var attributes = 'width='+window_width+',height='+window_height+',top='+from_top+',screenY='+from_top+',left='+from_left+',screenX='+from_left+',yoolbar='+has_toolbar+',location='+has_location+',directories='+has_directories+',status='+has_status+',menubar='+has_menubar+',scrollbars='+has_scrollbars+',resizeable='+is_resizeable;

        window.open(URL,'',attributes);

			  window.open(page,"", stile);
		}