Bug 209309 Show javascript errorposition
If a javascript expression has errors, the error message is shown in the last lines in the preview tab. But there is no info where the error occurs. In most cases you had to guess the error location. It would be very helpfull to display the error location.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/executor/ExecutionContext.java
* @return Returns the report.
	 */
	public IReportContent getReportContent( )
	{
		return reportContent;
	}
	public void setReportContent( IReportContent content )
	{
		this.reportContent = content;
		content.getErrors( ).addAll( onPrepareErrors );
	}
	/**
	 * Loads scripts that are stored in an external file. Used to support
	 * include-script. Each script file should be load only once. and the script
	 * in the file must be encoded in UTF-8.
	 * 
	 * @param fileName
	 *            script file name
	 */
	public void loadScript( String fileName )
	{
		ReportDesignHandle reportDesign = this.getDesign( );
		URL url = null;
		if ( reportDesign != null )
		{
			url = reportDesign.findResource( fileName,
					IResourceLocator.LIBRARY );
		}
		if (url == null)
		{