Bug 146709 Dates still do not work from main report to sub reports...
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/HTMLActionHandler.java
*/
	public String getURL( IAction actionDefn, Object context )
	{
		if ( actionDefn == null )
		{
			return null;
		}
		String url = null;
		switch ( actionDefn.getType( ) )
		{
			case IAction.ACTION_BOOKMARK :
				if ( actionDefn.getActionString( ) != null )
				{
					url = "#" + actionDefn.getActionString( );
				}
				break;
			case IAction.ACTION_HYPERLINK :
				url = actionDefn.getActionString( );
				break;
			case IAction.ACTION_DRILLTHROUGH :
				url = buildDrillAction( actionDefn, context );
				break;
			default :
				assert false;
		}
		return url;
	}
	/**
	 * builds URL for drillthrough action
	 *