Bug 195627 Mouse Double Click drill link to Internal bookmark dos not work for PNG [13]
Description: Mouse Double Click drill link to Internal bookmark dos not work for PNG. Build number: 2.2.0.v20070706-0959 Steps to reproduce: 1. New a Chart with bookmark "bookmark", page break after Always. 2. New another chart, output format is PNG, in "Format Chart" tab add interactivity for Value Series, select Mouse Double click as Event, select Action Hyperlink to internal bookmark "bookmark". 3. Preview, click the series of the second chart. Expected result: Can link to the first chart. Actual result: Can not link to the first chart. Error log: N/A
chart/org.eclipse.birt.chart.device.extension/src/org/eclipse/birt/chart/device/image/JavaxImageIOWriter.java
protected String eval2JS( String expr )
	{
		if ( expr == null )
		{
			return ""; 
		}
		
		
		return expr;
	}
	/**
	 * When 1). The action is supported, and the action type is INVOKE_SCRIPT.
	 * 2). The script has not been added into ImageMap. 3). The action acts on
	 * the value series area. Add the script into ImageMap.
	 * 
	 * @param sa
	 *            ShapedAction
	 * @param sb
	 *            StringBuffer
	 */
	private void userCallback( ShapedAction sa, StringBuffer sb )
	{
		if ( !bAddCallbackByClick )
		{
			addScriptCallBack( sa,
					sb,
					sa.getActionForCondition( TriggerCondition.ONCLICK_LITERAL ),
					getJSMethodName( TriggerCondition.ONCLICK_LITERAL ) );
			bAddCallbackByClick = true;
		}