Bug 156912 Proxy problems with birt-viewer.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/ParameterAccessor.java
* Check whether show the navigationbar.
	 * 
	 * @param request
	 * @return
	 */
	public static boolean isShowNavigationbar( HttpServletRequest request )
	{
		boolean isNavigationbar = true;
		if ( "false".equalsIgnoreCase( getParameter( request, PARAM_NAVIGATIONBAR ) ) ) 
		{
			isNavigationbar = false;
		}
		return isNavigationbar;
	}
	/**
	 * Check whether force prompting the parameter dialog. Default to false.
	 * 
	 * @param request
	 * @return
	 */
	public static boolean isForceParameterPrompting( HttpServletRequest request )
	{
		boolean isParameterPrompting = false;
		if ( "true".equalsIgnoreCase( getParameter( request, PARAM_PARAMETER_PROMPTING ) ) ) 
		{
			isParameterPrompting = true;
		}
		return isParameterPrompting;
	}
}