FCKStyle = function( styleDesc )
{
	this.Element = ( styleDesc.Element || 'span' ).toLowerCase() ;
	this._StyleDesc = styleDesc ;
}
@param {Object} styleDesc A "style descriptor" object, containing the raw
style definition in the following format:
		'<style name>' : {
			Element : '<element name>',
			Attributes : {
				'<att name>' : '<att value>',
				...
			},
			Styles : {
				'<style name>' : '<style value>',
				...
			},
			Overrides : '<element name>'|{
				Element : '<element name>',
				Attributes : {
					'<att name>' : '<att value>'|/<att regex>/
				},
				Styles : {
					'<style name>' : '<style value>'|/<style regex>/
				},
			}
		}