--- loncom/html/adm/help/tex/Problem_LON-CAPA_Functions.tex	2014/12/14 02:44:04	1.31
+++ loncom/html/adm/help/tex/Problem_LON-CAPA_Functions.tex	2017/01/19 21:12:45	1.32
@@ -170,6 +170,10 @@ optional array of wrong answers that sho
 Returns the ID of the current part.\\
 \hline
 
+\&input\_id(part\_id, response\_id, textline\_id) & 
+Returns the HTML id of the input field. This is useful in Javascript scripts to get a safe reference to a response textline field with \texttt{document.getElementById()}.\\
+\hline
+
  
 Not implemented  & Get and set the random seed. \\
 \hline