Sightly sample code

You can use javascript with slightly (html). In your JavaScript you have access to implicit objects such as PageManager, currentContent, currentSession etc. You need to create a function in your js file that returns the value such as page node etc. Once you have that then you can use slightly to pull the value from your javascript using helper object . Example of this can be found under the link below.

http://blogs.adobe.com/experiencedelivers/experience-management/htl-javascript-use-api/

Normally this goes via Java/Javascript, however I strongly advise against the Node.class api.

It is too low-level, better to use things like the ValueMap api

In JSP the below lines gives the node jcr:content, how to achieve similar thing in sightly. How to get Page from Node and iterate through the pages in sightly?? Can you please help.

 String path = "/content/usergenerated/jcr:content";

     Node node = currentPage.getContentResource().adaptTo(Node.class);
      String title = node.getName(); 
            out.println(title);

Use the Java Sling API and Java class that extends WCMUsePojo. You can use Java API to retrieve information about JCR resources like pages.