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
{
		IBaseResultSet currentRset;
		int resultType = -1;
		public ResultIteratorTree( IBaseResultSet rset )
		{
			this.currentRset = rset;
			if ( rset instanceof IQueryResultSet )
			{
				resultType = ILinkedResult.TYPE_TABLE;
			}
			else if ( rset instanceof ICubeResultSet )
			{
				resultType = ILinkedResult.TYPE_CUBE;
			}
		}
		public ILinkedResult getParent( )
		{
			return new ResultIteratorTree( currentRset.getParent( ) );
		}
		public Object getCurrentResult( )
		{
			if ( resultType == ILinkedResult.TYPE_TABLE )