Bug 173582 Run servlet should not be affected by values in document.[0000]
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/taglib/AbstractViewerTag.java
/**
	 * Handle IFrame definition
	 * 
	 * @return
	 */
	protected String __handleIFrameDefinition( )
	{
		
		String iframe = "<iframe name=\"" + viewer.getId( ) 
				+ "\" frameborder=\"" + viewer.getFrameborder( ) + "\" "; 
		if ( viewer.getScrolling( ) != null )
			iframe += " scrolling = \"" + viewer.getScrolling( ) + "\" "; 
		iframe += __handleAppearance( ) + "></iframe>\r\n"; 
		return iframe;
	}
	/**
	 * IFrame Appearance style
	 * 
	 * @return
	 */
	protected String __handleAppearance( )
	{
		String style = " style='"; 
		
		if ( viewer.getPosition( ) != null )
			style += "position:" + viewer.getPosition( ) + ";"; 
		
		if ( viewer.getHeight( ) >= 0 )
			style += "height:" + viewer.getHeight( ) + "px;";