/// <summary>
/// Ensures that the specified length is converted to pixels if necessary
/// </summary>
/// <param name="length"></param>
private string NoEms(string length)
{
CssLength len = new CssLength(length);
if (len.Unit == CssLength.CssUnit.Ems)
{
length = len.ConvertEmToPixels(GetEmHeight()).ToString();
}
return length;
}
