Bug 179636 [Smoke] Chart can not be previewed [0001]
Description: Chart can not be previewed Build number: 2.2.0.v20070328-0630 Steps to reproduce: 1. New a chart, preview. Expected result: Chart is displayed correctly. Actual result: Chart can not be previewed. Error log: N/A
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/ParameterAccessor.java
* @param request
	 *            http request
	 * @return is get image or not
	 */
	public static boolean isGetImageOperator( HttpServletRequest request )
	{
		String imageName = getParameter( request, PARAM_IMAGEID );
		return imageName != null && imageName.length( ) > 0;
	}
	/**
	 * Check whether the request is to get reportlet.
	 * 
	 * @param request
	 *            http request
	 * @return is get reportlet or not
	 */
	public static boolean isGetReportlet( HttpServletRequest request )
	{
		return isBookmarkReportlet( request ) || isIidReportlet( request );
	}
	/**
	 * if the PARAM_ISREPORTLET is trure and the PARAM_BOOKMARK is not null,
	 * this method will return true. Otherwise, return false.
	 * 
	 * @param request
	 * @return true for render the reportlet based on bookmark, else, false.
	 */
	public static boolean isBookmarkReportlet( HttpServletRequest request )
	{
		if ( "true"