function popup(url, id, showTopArea, showScrollbars, showStatusbar, l, t, w, h)
{
	var topArea = showTopArea ? "yes" : "no";
	var scrollbars = showScrollbars ? "yes" : "no";
	var stat = showStatusbar ? "yes" : "no";
	var params = "copyhistory=no,location=" + topArea + ",menubar=" + topArea + ",scrollbars=" + scrollbars + ",status=" + stat + ",toolbar=" + topArea + ",left=" + l + ",top=" + t + ",height=" + h + ",width=" + w;
	
	var win = window.open(url, id, params);
	if (l == 0 && t == 0) win.moveTo((screen.availWidth - w) / 2, (screen.availHeight - h) / 2);
	win.focus();
	return false;
}