Bug 123726 "Top n", "Bottom n" in highlight dialog doesn't work.
Description: "Top n", "Bottom n" in highlight dialog doesn't work. Steps to reproduce: 1. Add a highlight for a table. 2. Set highlight rule: "account_id", "top n", "3", let its font color red. 3. Preview the report, it doesn't work. Attached is design file.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/script/ScriptEvalUtil.java
* Utility for miscellaneous use
	 * 
	 */
	private static class MiscUtil
	{
		/**
		 * 
		 * @param resultExpr
		 * @param resultOp1
		 * @return
		 */
		private static boolean isSameType( Object resultExpr, Object resultOp1 )
		{
			return resultExpr.getClass( ).equals( resultOp1.getClass( ) );
		}
		
		/**
		 * 
		 * @param result
		 * @return
		 */
		private static boolean isNumericOrString( Object result )
		{
			return ( result instanceof Number ) || ( result instanceof String );
		}
		/**
		 * 
		 * @param result
		 * @return
		 */