javascript - Adding a list item client-side -

I would say that I am making a full start to rail, so that's right, so it can be clear That i'm missing

I have a web form for editing a list of questions ( & lt; ul & gt; ) Each item has an item in the list. There is a text field and a dropdown for the question text of each question that is to indicate this type of question (multiple choice, true / false, etc.). I want to add the user's ability to add new questions, click on a link and a new text box and dropdown appear as items in the list.

I have not found a very clean way to do this, so I'm sorting it together from various tutorials

  & lt; H1 & gt; Edit Survey: & lt;% = "########================================= ================ {@ Survey.name} "-%> & Lt; / H1> & Lt;% form_for @survey ,: url = & gt; {: Action = & gt; 'Update' ,: ID = & gt; Params [: id]} Do | Survey_form | & Gt%; & Lt; H2 & gt; Title: & lt;% = survey_form.text_field: name% & gt; & Lt; / H2 & gt; & Lt; Ol class = 'question_list' & gt; @ Survey in the & lt;% @ survey Questions% & gt; & Lt;% fields_for "question []". F | | & Gt%; & Lt; Li & gt; & Lt;% = f.text_field: q_text% & gt; & Lt; Br> & Lt;% = Select (: Question ,: q_type, {"True / False" = "gtc:" T "," Multiple Choice "=>" M "})% & gt; & lt; br & gt; ; & Lt; / li & gt; & gt;% end% & gt; & lt;% end% & gt; & lt; / ol> & lt;% = link_to_function "Add another question", update_page { | Page | pages | end_tag: update '% = submit_tag' below, 'empty_question', (render: partial = & gt; 'empty_question', object = & gt; @ question)}%> & Lt; br & gt; & lt;% end% & gt; & lt;% "for form_"% & gt; ending & lt;% = link_to "back", {: verb = & gt; ; 'List'}%>  

I have created another ARB file named _blank_question.erb, which is "I have another question

  
 LET;% = text_field: question, id, size => 25%> & gt; Lt; br & gt; & lt;% = Select (: Question ,: q_type, {"True / False" = "gt": "T", "Multiple Choice" = & gt; "M"})% & gt; & Lt; Br> & Lt; / Li & gt;  

The problem is that when I click on the "Add another Question" link, I get the following error in the popup. RJS error:

TypeError: Object '(element) element in the [[native code]}' insert 'a method in' Insert '[the original code]}' insert ' Do not

Very little Googling has not done any useful results. Any idea why I am wrong here?