Bug 166001 The webpage can't be found in WebView, if "WebViewer.startup( null );" is not called.
Now I'm using a SVG viewer to preview report in designer, it need not a HTTP server. So I removed "WebViewer.startup( null );" from designer's initial process, but I found those "web view as ..." all can not open a web page.
viewer/org.eclipse.birt.report.viewer/src/org/eclipse/birt/report/viewer/utilities/WebViewer.java
*            the parameter map to set
	 */
	public static void display( String report, Browser browser, Map params )
	{
		browser.setUrl( createURL( report, params )
				+ "&" + new Random( ).nextInt( ) ); 
	}
	/**
	 * Displays the specified url using eclipse SWT browser.
	 * 
	 * @param report
	 *            report report
	 * @param params
	 *            the parameter map to set
	 */
	public static void display( String report, Map params )
	{
		try
		{
			BrowserAccessor.getPreviewBrowser( false )
					.displayURL(
							createURL( report, params )
									+ "&" + new Random( ).nextInt( ) ); 
		}
		catch ( Exception e )
		{
			
		}
	}
}