/// <summary>
/// Search for a given element from among the matched elements.
/// </summary>
///
/// <returns>
/// The index of the element, or -1 if it was not found.
/// </returns>
///
/// <url>
/// http://api.jquery.com/index/
/// </url>
public int Index()
{
IDomObject el = SelectionSet.FirstOrDefault();
if (el != null)
{
return(GetElementIndex(el));
}
return(-1);
}