How to show single quote on a JSP page

Currently I am using javascript together with java codes.
here is the snippets.
var TREE_NODES = [
['<%=dirName%>', null, null,
          <% path +=(String)dirname.get(i);
               System.out.println(" Path Name is "+path);
               if (tem.checkdir(path))
                    Vector subFold = new Vector();
%>
I try to replace \' but it doesnt work cos this will caus this part ( ['<%=dirName%>', ) to end abruptly causing the page to be faulty...
hope that someone can help me out with this.

dirName has a ' in it, right?
<%= dirName.replaceAll("\\\'", "\\\\\\\'"); %>

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How to show single quote on a JSP page

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