protected static Boolean ExpandPeriodic(CssValueList list)
{
if (list.Length == 0 || list.Length > 4)
{
return(false);
}
if (list.Length == 1)
{
list.Add(list[0]);
}
if (list.Length == 2)
{
list.Add(list[0]);
}
if (list.Length == 3)
{
list.Add(list[1]);
}
return(true);
}