function wop(url, wnd_name, width, height)
{
	w = window.open(
			url, 
			wnd_name, 
			'width=' + width + ', height = ' + height + ', status = no, menubar = no, resizable = no, scrollbars = yes, left = ' + String((screen.width - width)/2) + ', top = ' + String((screen.height - height)/2)
		);
	w.focus();
	return w;
}

function wop2(url, wnd_name, width, height)
{
	w = window.open(
			url, 
			wnd_name, 
			'width=' + width + ', height = ' + height + ', status = no, menubar = no, resizable = no, scrollbars = no, left = ' + String((screen.width - width)/2) + ', top = ' + String((screen.height - height)/2)
		);
	w.focus();
	return w;
}

function check(f)
{
	if(f.elements["login"].value=='')
	{
		alert("Ââåäèòå ëîãèí");
		f.elements["login"].focus();
		return false;
	}
	else if(f.elements["password"].value=='')
	{
		alert("Ââåäèòå ïàðîëü");
		f.elements["password"].focus();
		return false;
	}
	else
		return true;
}