public static Object[][] getData(String sheetName) {
		
			// return and read test data from excel
			int rows = (datatable.getRowCount(sheetName) - 1);
			if(rows <= 0){
				
				Object[][] testData = new Object[1][];
				return testData;
			}
			
			rows = datatable.getRowCount(sheetName);
			int cols = datatable.getColumnCount(sheetName);
			
			Object data[][] = new Object[rows-1][cols];
			
			for(int rowNum=2; rowNum<=rows; rowNum++){
				
				for(int colNum=0; colNum<cols; colNum++){
					
					data[rowNum-2][colNum] = datatable.getCellData(sheetName, colNum, rowNum);
				}
			}
			
			return data;	
	}