public String getLyricsWebPage(String artistName,String songName){
		try {
			
			if (artistName.equals(null) || artistName.equals("") || songName.equals(null) || songName.equals(""))
				return null;
			
			String url = buildUrl(artistName,songName);

			Document document = reader.read(url);
//			XMLUtil.writeToFile(document, artistName + " - " + songName + ".xml");
		
			Element root = document.getRootElement(); //LyricsResult element
		
			Element pageIdElement = root.element("page_id"); // page_id element
			String pageId = pageIdElement.getText();
			
			if(pageId.equals("")){ //there is NOT lyrics page
				System.out.println("No lyrics page.");
				return null;
			}
			else
				return root.element("url").getText();		
			
		} catch (Exception e) {
			return null;
			//e.printStackTrace();
		}
	}