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GetCreatorEditorAndDate.js

function GetCreatorEditorAndDates()

    {

        var relativePageURL = _spPageContextInfo.serverRequestPath;

        var siteURL = _spPageContextInfo.webAbsoluteUrl; 

        var profileUrl = "http://mysites.MYCOMPANY.com/Person.aspx?accountname="; <!-- fill in with your own mysites/profile url -->

        

        var query = siteURL + "/_api/web/getfilebyserverrelativeurl('/"+ relativePageURL +"')?$select=TimeCreated,Author/Title&$expand=Author/LoginName,TimeLastModified,ModifiedBy/Title,ModifiedBy/LoginName&$expand=ModifiedBy";

                

        var call = $.ajax({

            url: query,

            type: "GET",

            dataType: "json",

            headers: {

                Accept: "application/json;odata=verbose"

            }       

        });

        call.done( (function (data, textStatus, err){
		  
		  var months = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'];
		  
		  var ordinal = ['th', 'st', 'nd', 'rd', 'th', 'th', 'th', 'th', 'th', 'th', 'th', 'th', 'th', 'th', 'th', 'th', 'th', 'th', 'th', 'th', 'th', 'st', 'nd', 'rd', 'th', 'th', 'th', 'th' ,'th', 'th', 'th', 'st'];
		  
          var rawModifedDate = new Date(data.d.TimeLastModified);

          var modifedDate = rawModifedDate.getDate() + ordinal[rawModifedDate.getDate()] + ' ' + months[rawModifedDate.getMonth()] + ' ' +rawModifedDate.getFullYear();
		
		  document.getElementById('addedModified').innerHTML = 'Added by ' + data.d.Author.Title + '. Last modified by ' + data.d.ModifiedBy.Title + ' on ' + modifedDate;
			
        }));

        call.fail(function (err,textStatus,errorThrown){

            console.log(err);

        });

    };