<hyggekode>

// load jquery as it is not in the system master

loadScript('**link to jQuery**', function () {

    _spBodyOnLoadFunctionNames.push("waitForSP");

});

function waitForSP() {

if (location.href.toLowerCase().indexOf('newform.aspx')>-1) {

ExecuteOrDelayUntilScriptLoaded(loadCurrentUser, "sp.js");

}

}

var errorCount = 0;

var context = null;

var web = null;

var currentUser = null;

var listItems = null;

var fieldName = 'Kontaktperson';

function loadCurrentUser() {

    context = new SP.ClientContext.get_current();

    web = context.get_web();

    context.load(web);

    context.executeQueryAsync(loadUser, onFailureMethod);

}

function loadUser(sender, args) {

    try {

        currentUser = web.get_currentUser();

    }

    catch (ex) {

        onFailureLoadUser(sender, args);

    }

    context.load(currentUser);

    context.executeQueryAsync(loadProfile, onFailureLoadUser);

}

function loadProfile(sender, args) {

    userInfoList = web.get_siteUserInfoList();

    camlQuery = new SP.CamlQuery();

    camlQuery.set_viewXml('<View><Query><Where><Eq><FieldRef Name=\'ID\'/><Value Type=\'Number\'>' + currentUser.get_id() + '</Value></Eq></Where></Query><RowLimit>1</RowLimit></View>');

    listItems = userInfoList.getItems(camlQuery);

    context.load(listItems);

    context.executeQueryAsync(onProfileSuccessMethod, onFailureMethod);

}

function onProfileSuccessMethod(sender, args) {

    var item = listItems.itemAt(0);

    var loginname = item.get_item('Name');

    if (typeof (loginname) != 'undefined') {

        SetAndResolvePeoplePicker(loginname);

    }

}

function onFailureMethod(sender, args) {

    alert('Error: ' + args.get_message() + '\n' + args.get_stackTrace());

}

function onFailureLoadUser(sender, args) {

    if (errorCount < 5) {

        errorCount++;

        setTimeout(function () { loadCurrentUser(); }, 1000);

    } else {

        onFailureMethod(sender, args);

    }

}

function SetAndResolvePeoplePicker(userAccountName) {

    var peoplePickerDiv = $("[id$='ClientPeoplePicker'][title='" + fieldName + "']");

    var peoplePickerEditor = peoplePickerDiv.find("[title='" + fieldName + "']");

    var spPeoplePicker = SPClientPeoplePicker.SPClientPeoplePickerDict[peoplePickerDiv[0].id];

    peoplePickerEditor.val(userAccountName);

    spPeoplePicker.AddUnresolvedUserFromEditor(true);

}

function loadScript(url, callback) {

    var head = document.getElementsByTagName('head')[0];

    var script = document.createElement('script');

    script.type = 'text/javascript';

    script.src = url;

    script.onreadystatechange = callback;

    script.onload = callback;

    head.appendChild(script);

}