Bug 140620 Chart scripting errors are ignored
Write a chart with an invalid script, the execution simply ignores the script. This makes it difficult to debug scripting. The error message is also not precise and needs improvements.
chart/org.eclipse.birt.chart.device.extension/src/org/eclipse/birt/chart/device/image/JavaxImageIOWriter.java
}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.chart.device.IImageMapEmitter#getMimeType()
	 */
	public abstract String getMimeType( );
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.chart.device.IImageMapEmitter#getImageMap()
	 */
	public String getImageMap( )
	{
		Map triggerMap = getTriggers( );
		if ( triggerMap == null || triggerMap.size( ) == 0 )
		{
			return null;
		}
		
		StringBuffer sb = new StringBuffer( );
		
		List al = (List) triggerMap.get( TriggerCondition.ONFOCUS_LITERAL );
		if ( al != null )
		{
			for ( int i = al.size( ) - 1; i >= 0; i-- )
			{
				HTMLTag tag = new HTMLTag( "AREA" ); 
				ShapedAction sa = (ShapedAction) al.get( i );
				Action ac = sa.getAction( );