SharePoint Person or Group Field – Populate with Current User as the Default Value

I’m having a user type field in one of my publishing page layouts and I wanted to default it to current user. So when an author creating a page, user field will automatically populated with the current user. If author decided to change the value and set it to another user, new value will be retained.

I found this post: Set SharePoint PeoplePicker Fieldmark 2 in Andy Bonner's Blog, where the provided script is working fine in SharePoint 2010, but not in SharePoint 2013.

Here is the slightly modified version of the script for SharePoint 2013:

<script type="text/javascript">

_spBodyOnLoadFunctionNames.push("fillDefaultValues");

function fillDefaultValues() {

  fillPeoplePickerWithCurrentUser(1);

  fillPeoplePickerWithCurrentUser(2);

}

function fillPeoplePickerWithCurrentUser(pickerNo) {

  var currentUser = getCurrentUser();

  if (currentUser != null) {

    var pp = getPickerImputElement(pickerNo);

    if (pp != null) {

      if (pp.innerHTML == '') {

        pp.innerHTML = currentUser;

      }

    }

  }

}

function getPickerImputElement(pickerNo) {

  var result = '';

  var divs = document.getElementsByTagName('DIV');

  var j = 0;

  for (var i = 0; i < divs.length; i++) {

    if (divs[i].id.indexOf('UserField_upLevelDiv') > 0) {

      j++;

      if (j == pickerNo) {

        result = divs[i];

        break;

      }

    }

  }

    return result;

}

function getCurrentUser() {

    var tags = document.getElementsByTagName('a');

    for (var i = 0; i < tags.length; i++) {

        if (tags[i].id == 'zz4_Menu') {

            var userName = tags[i].innerHTML;

            userName = userName.substr(0, userName.indexOf("<"))

            return userName;

        }

    }

}

</script>