Bug 206864 Error in IE using nested birt tags when reportContainer is IFrame
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/taglib/AbstractViewerTag.java
*/
public abstract class AbstractViewerTag extends AbstractBaseTag
{
	/**
	 * Locale information
	 */
	protected Locale locale;
	/**
	 * Report parameters
	 */
	protected Map parameters;
	/**
	 * Then entry to initialize tag
	 * 
	 * @throws Exception
	 */
	public void __init( )
	{
		super.__init( );
		parameters = new HashMap( );
	}
	/**
	 * validate the tag
	 * 
	 * @see org.eclipse.birt.report.taglib.AbstractBaseTag#__validate()
	 */
	public boolean __validate( ) throws Exception
	{
		String hasHostPage = (String) pageContext.getAttribute( ATTR_HOSTPAGE );
		if ( hasHostPage != null && "true".equalsIgnoreCase( hasHostPage ) )