function openPopupStd( url, dimx, dimy, sScroll) {
		dimwidth = dimx;
		dimheight = dimy;
		x = (800 - dimwidth)/2, y = (600 - dimheight)/2;
		if (screen) {
			x = (screen.availWidth - dimwidth)/2;
			y = (screen.availHeight - dimheight)/2;
		}
		finestra1 = window.open(url,'','location=no,status=no,scrollbars='+sScroll+',resizable=no,width='+dimwidth+',height='+dimheight+',screenX='+x+',screenY='+y+',top='+y+',left='+x);
		finestra1.focus();
	}
		
	function isBoxChecked(obj) {
		if (obj.length != undefined ) {
			for (var i=0; i < obj.length ;i++) {
				if (obj[i].checked) return true;
			}
		} else {
			if (obj.checked) return true;
		}
	}