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
*            the "this" object in the new scope
	 */
	public void newScope( Object object )
	{
		Object jsObject = scriptContext.javaToJs( object );
		if ( jsObject instanceof Scriptable )
		{
			scriptContext.enterScope( (Scriptable) jsObject );
		}
		else
		{
			scriptContext.enterScope( );
		}
	}
	/**
	 * exits a variable scope.
	 */
	public void exitScope( )
	{
		scriptContext.exitScope( );
	}
	/**
	 * register beans in the execution context
	 * 
	 * @param map
	 *            name value pair.
	 */
	public void registerBeans( Map map )
	{
		if ( map != null )