Get publishing page url using CAML

I am retrieving pages using CAML, and doing for loop on the results like the following:

 function _onSucceed(){
            var html="";

            for(var i = 0; i <results.length; i++){
              html+= results[i].get_item("PublishingPageImage");
            }

       }

But what property should I use if I want to get the url for the page? Also how do I get a list of properties I can use for the returned type. All I can see in the developer tool is just method definitions like get_item and so on, but how do I know exact properties I can use with get_item() ?