How to format an Edm.DateTime string from an oData query

Hi All,

I'm really progressing with my JS development, thanks to all the Dynamics community

My next question is regarding the Edm.DateTime format with in oData query

        var i;
        var showAlert = "";
        for (i = 0; i < alertArray.length; i++) {
               showAlert +=  alertArray[i].CreatedOn + "   -   " + alertArray[i].new_Alert + "\n";
        }
        Xrm.Page.getAttribute("new_clientalerts").setValue(showAlert);
   }

Above is the code snippet that processes the oData query.  Held in alertArray is the CreatedOn Edm.DateTime field.  This writes to CRM in the following format

/Date(1452643163000)/
/Date(1448985498000)/

What would be the best way to format this into DD/MM/YYYY

Thanks