code: public String to_string() 
  	{
  		String str = "";
  		if (pageno > 0) 
  			str = "pageno="+pageno;
  		
  		if (pagesize > 0) 
  		{
  			if (str.length() > 0)
  				str = str + "&";
  			
  			str = str +"pagesize="+pagesize;
  		}
  		
  		if (detailview) 
  		{
  			if (str.length() > 0)
  				str = str + "&";
  			
  			str = str +"view=detail";
  		}
  		
  		if (count) 
  		{
  			if (str.length() > 0)
  				str = str + "&";
  			
  			str = str +"count=yes";
  		}
  		
  		if (args != null) {
  			if (str.length() > 0)
  				str = str + "&";
  			str = str+"args="+args;
  		}
  		if (filter != null) {
  			if (filter.length() > 0)
  				str = str + "&";
  			str = str+"filter="+filter;
  		}
  		return str;
  	}
docs: constructs a string for options object.
  @return String to be concatenated to the URL.