public String getParameterString(){
		String retString = super.getParameterString();
		try{
			if(showSourceText!=null) retString+="&showSourceText="+(showSourceText?"1":"0");
			if(target!=null) retString+="&target="+URLEncoder.encode(target, "UTF-8");
					
		}
		catch(UnsupportedEncodingException e ){
			retString = "";
		}
		
		return retString;
	}