/// <summary>
/// Returns the value of the "src" or "href" attribute, depending on the element type. If non
/// applicable, returns empty string.
/// </summary>
///
/// <param name="obj">
/// The obj to act on.
/// </param>
///
/// <returns>
/// A string
/// </returns>
public static string UrlSource(this IDomObject obj)
{
switch (obj.NodeNameID)
{
case HtmlData.tagLINK:
case HtmlData.tagA:
return(obj.GetAttribute("href"));
case HtmlData.tagIMG:
case HtmlData.tagSCRIPT:
return(obj.GetAttribute("src"));
default:
return("");
}
}